MESON Chess Problem Database

Problem Display
PID: 108421 (1Q1R4/2p2nP1/4p1p1/2N1Pk2/K1P4P/1N2P1bP/2P3R1/BB6 w - - 0 1)

Hirschenson, Aaron

3rd HM., Pat a Mat, 2000

1Q1R4/2p2nP1/4p1p1/2N1Pk2/K1P4P/1N2P1bP/2P3R1/BB6

#2

15 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bf2
      • 2.Rxf2#
    • 1...Bf4
      • 2.e4#
    • 1...c6
      • 2.Sd4#
      • 2.c3#
  • Tries
    • 1.Rf2+?
      • 1...Bf4
        • 2.Rxf4#
        • 2.e4#
      • 1...Bxf2!
    • 1.g8S?
      • threat
        • 2.Se7#
      • 1...Bxe5
        • 2.c3#
      • 1...Sxe5
        • 2.Sd4#
      • 1...Bxh4!
  • Keys
    • 1.Rd5!
      • threat
        • 2.Sd4#
        • 2.c3#
      • 1...Bxe5
        • 2.Rf2#
      • 1...Sxe5
        • 2.Qf8#
      • 1...exd5
        • 2.Qc8#
      • 1...g5
        • 2.c3#
      • 1...Sg5
        • 2.Sd4#
      • 1...Sd6
        • 2.Sd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • B(a);N_GUARD::R(D),XB(a)
    • B(a);SBLOCK::P(F)
  • Tries
    • Try
      • R(D);CHECK
      • Refutation
        • B(a);XR(D)
    • Try
      • P(M);
      • Threat
        • S(M)
      • Vars
        • B(a);SBLOCK,XP(L)::B(B)+P(C)
        • S(f);SBLOCK,XP(L)::S(E)
      • Refutation
        • B(a);XP(J)
  • Actual
    • R(O);
    • Threat
      • DUALS(2)
    • Vars
      • B(a);N_GUARD,P_SPINB(a),XP(L)::R(D)
      • S(f);OGATEB,P_SPINS(f),XP(L)::QAR(N)
      • P(c);OGATEB,XR(O)::QAB(N)
      • P(d);::B(B)+P(C)
      • S(f);::S(E)
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