MESON Chess Problem Database

Problem Display
PID: 265880 (7B/r6B/4P3/5R2/1NP3p1/3R2Kb/1p1P4/k7 w - - 0 1)

Hirschenson, Aaron

The Problemist, 1996

7B/r6B/4P3/5R2/1NP3p1/3R2Kb/1p1P4/k7

#2

9 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Bf1
      • 2.Rxf1#
  • Tries
    • 1.Ra3+?
      • 1...Kb1
        • 2.Rf1#
      • 1...Rxa3+!
    • 1.Rc3?
      • threat
        • 2.Rc1#
      • 1...Kb1
        • 2.Rf1#
      • 1...b1Q
        • 2.Ra3#
      • 1...b1S
        • 2.Ra3#
      • 1...b1B
        • 2.Ra3#
      • 1...b1R
        • 2.Ra3#
      • 1...Rg7
        • 2.Ra5#
      • 1...Ra3!
    • 1.Re3?
      • threat
        • 2.Re1#
      • 1...Kb1
        • 2.Re1#
        • 2.Rf1#
      • 1...Rg7
        • 2.Ra5#
      • 1...Ra3!
  • Keys
    • 1.Re5!
      • threat
        • 2.Re1#
      • 1...Kb1
        • 2.Re1#
      • 1...b1Q
        • 2.Ra5#
      • 1...b1S
        • 2.Ra5#
      • 1...b1B
        • 2.Ra5#
      • 1...b1R
        • 2.Ra5#
      • 1...Rg7
        • 2.Ra3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • B(c);N_GUARD::R(F),XB(c)
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT::B(H)+R(F),DCHECK
      • Refutation
        • R(e);CHECK,XR(B)
    • Try
      • R(B);N_PINP(b)
      • Threat
        • R(B)
      • Vars
        • K(a);P-FLIGHT::B(H)+R(F),DCHECK
        • P(b);SBLOCK::B(I)+R(B),DCHECK
        • R(e);N_GUARD::R(F)
      • Refutation
        • R(e);P_PINR(B)
    • Try
      • R(B);
      • Threat
        • R(B)
      • Vars
        • R(e);N_GUARD,N_SPINP(b)::R(F)
      • Refutation
        • R(e);P_PINR(B)
  • Actual
    • R(F);N_PINP(b)
    • Threat
      • R(F)
    • Vars
      • K(a);P-FLIGHT::R(F)
      • P(b);SBLOCK::B(I)+R(F),DCHECK
      • R(e);N_GUARD::R(B)
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