MESON Chess Problem Database

Problem Display
PID: 270327 (4K3/8/2ppNpR1/2n1bkPP/3P4/8/5PQ1/5R2 w - - 0 1)

Moen, Kabe

The Problemist Supplement, 2022

4K3/8/2ppNpR1/2n1bkPP/3P4/8/5PQ1/5R2

#2

9 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Bh2
      • 2.Rxf6#
    • 1...Bf4
      • 2.Sg7#
      • 2.Rxf6#
    • 1...Se4
      • 2.Qh3#
  • Tries
    • 1.Qf3+?
      • 1...Bf4
        • 2.Sg7#
        • 2.Rxf6#
      • 1...Kxe6!
    • 1.f4?
      • threat
        • 2.Sg7#
      • 1...Kxe6
        • 2.f5#
      • 1...fxg5
        • 2.fxe5#
      • 1...Sxe6!
  • Keys
    • 1.Re1!
      • threat
        • 2.Qh3#
      • 1...Kxe6
        • 2.Rxf6#
      • 1...Sxe6
        • 2.Qe4#
      • 1...fxg5
        • 2.Qxg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • B(b);N_GUARD::R1(H),XP(f)
    • S(a);SBLOCK::QAB(C)
  • Tries
    • Try
      • Q(C);CHECK
      • Refutation
        • K(c);P_SPINP(f),S_FLIGHT,XS(G)
    • Try
      • P(B);
      • Threat
        • S(G)
      • Vars
        • K(c);OGATE,P_SPINP(f),S_FLIGHT,XS(G)::P(B)
        • P(f);XP(E)::R(A)+P(B),XB(b)
      • Refutation
        • S(a);XS(G)
  • Actual
    • R(A);
    • Threat
      • QAB(C)
    • Vars
      • K(c);P_SPINB(b),P_SPINP(f),S_FLIGHT,XS(G)::R1(H),XP(f)
      • S(a);N_GUARD,SBLOCK,XS(G)::QAB1(C)
      • P(f);OGATE,XP(E)::QAR1(C),XP(f)
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Developed and maintained by Brian Stephenson.
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