The Object of the game is to get your opponent take the last match stick.

The game of Nimb begins with a collection of N objects, or as the calculator plays it, with the positive number N. Each player alternately subtracts one, two, or more from the total until only one‘is left. The player forced to take the last one loses.

To begin the game you specify the maximum number that can be taken in a single move. Then you tell the calculator how many objects you wish to start with (i.e., the value of N).

After each move the machine will display the remaining total. A negative sign indicates that it is the player‘s move next, while a positive display

indicates that it is the HP-15C’s move.

As the challenger you are allowed to make the ?rst move. It is possible for you to win, but of course the HP-15C is a master player: it will not let you make an error and win. If you cheat by taking more than the specified limit the calculator will catch you and force you to repeat the move.

You can play an almost endless set of games, because you set the rules of each game with the A and B function keys.

This program is based on an HP-25 program by James L. Horn.

Starting with 15 objects, with a maximum allowable move of 3, play Nimb with the HP-15C.

3 A : For this game, players can take a maximum of 3 sticks per move

1 5 B :Start this game with 15 sticks on the pile

2 R/S : You pick up 2 sticks, the Calculator picks 1 leaving -12

3 R/S : You pick 3 sticks, the Calculator picks 1 stick leaving -8

3 R/S : You pick up 3 sticks, the Calculator picks 1 leaving -4

3 R/S : You pick up 3 sticks, leaving the Calculator to take the last one

Displays 3507.1 I LOSE upside down. You win the Calculator loses

3 A → 3.

1 5 B → -15. (Ready)

3 R/S → 12. (Player takes 3)

R/S → -9. (HP-15C takes 3)

2 R/S → 7. (Player takes 2)

R/S → -5. (HP-15C takes 2)

3 R/S → 3. (Player takes 3)

R/S → -1. (HP-15C takes 1)

1 R/S → 55178. (Player takes last one and loses)

Turn calculator upside down for message: BLISS

Name | Description | |
---|---|---|

A | Sets the maximum number of sticks you can take in each move. | |

B | Sets the number of sticks on the pile to start with. | |

0 | # Check validity of player's move, and compute Calculator's move. | |

1 | # Game Over (Display Win, or Lose Message) | |

2 | # Check to see if Player Won. | |

4 | # Display Sticks left on pile (Ready for Player's Move) |

Name | Description | |
---|---|---|

0 | Total (Pile) | |

1 | Max Grab per move+1 | |

2 | I.LOSE (upside down Calculator loses You win) | |

3 | BLISS (upside down Calculator wins You lose) |

Line | Display | Key Sequence | Line | Display | Key Sequence | Line | Display | Key Sequence | |||
---|---|---|---|---|---|---|---|---|---|---|---|

000 | 022 | 31 | R/S | 044 | 44,30, 0 | STO − 0 | |||||

001 | 42,21,11 | f LBL A | 023 | 42,21,12 | f LBL B | 045 | 45 0 | RCL 0 | |||

002 | 42, 7, 0 | f FIX 0 | 024 | 42, 7, 0 | f FIX 0 | 046 | 42 31 | f PSE | |||

003 | 44 0 | STO 0 | 025 | 44 0 | STO 0 | 047 | 1 | 1 | |||

004 | 1 | 1 | 026 | 42,21, 4 | f LBL 4 | 048 | 30 | − | |||

005 | 40 | + | 027 | 16 | CHS | 049 | 45 1 | RCL 1 | |||

006 | 44 1 | STO 1 | 028 | 31 | R/S | 050 | 10 | ÷ | |||

007 | 3 | 3 | 029 | 40 | + | 051 | 42 44 | f FRAC | |||

008 | 5 | 5 | 030 | 43,30, 2 | g TEST x<0 | 052 | 45 1 | RCL 1 | |||

009 | 0 | 0 | 031 | 22 0 | GTO 0 | 053 | 20 | × | |||

010 | 7 | 7 | 032 | 45 3 | RCL 3 | 054 | 43 20 | g x=0 | |||

011 | 48 | . | 033 | 22 1 | GTO 1 | 055 | 1 | 1 | |||

012 | 1 | 1 | 034 | 42,21, 0 | f LBL 0 | 056 | 44,30, 0 | STO − 0 | |||

013 | 44 2 | STO 2 | 035 | 43 36 | g LSTΧ | 057 | 42,21, 2 | f LBL 2 | |||

014 | 5 | 5 | 036 | 1 | 1 | 058 | 45 0 | RCL 0 | |||

015 | 5 | 5 | 037 | 43,30, 7 | g TEST x>y | 059 | 43,30, 0 | g TEST x≠0 | |||

016 | 1 | 1 | 038 | 22 2 | GTO 2 | 060 | 22 4 | GTO 4 | |||

017 | 7 | 7 | 039 | 33 | R⬇ | 061 | 45 2 | RCL 2 | |||

018 | 8 | 8 | 040 | 45 1 | RCL 1 | 062 | 42, 7, 1 | f FIX 1 | |||

019 | 44 3 | STO 3 | 041 | 43 10 | g x≤y | 063 | 22 1 | GTO 1 | |||

020 | 45 0 | RCL 0 | 042 | 22 2 | GTO 2 | ||||||

021 | 42,21, 1 | f LBL 1 | 043 | 34 | x↔y |