MESON Chess Problem Database

Problem Display
PID: 246549 (8/7p/b3R3/3pnppK/1B1NPkNR/bp2n2P/1rQp3P/7B w - - 0 1)

Segers, Marcel

The Problemist, 1989

8/7p/b3R3/3pnppK/1B1NPkNR/bp2n2P/1rQp3P/7B

#2

11 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Be2
      • 2.Sxe2#
    • 1...Bb7
      • 2.Se2#
    • 1...Bc8
      • 2.Se2#
    • 1...S3c4
      • 2.Se2#
    • 1...S3xg4
      • 2.Bxd2#
    • 1...Sd3
      • 2.Se2#
    • 1...S5c4
      • 2.Se2#
    • 1...S5xg4
      • 2.Qc7#
  • Tries
    • 1.Sxe3+?
      • 1...Sg4
        • 2.Sg2#
        • 2.Sxd5#
      • 1...gxh4
        • 2.Sg2#
        • 2.Sxd5#
      • 1...g4
        • 2.Sg2#
        • 2.Sxd5#
      • 1...Kxe3!
    • 1.Bxd2?
      • threat
        • 2.Bxe3#
      • 1...fxg4
        • 2.Rf6#
      • 1...Sc4
        • 2.Se2#
      • 1...Sxg4!
    • 1.Qc7?
      • threat
        • 2.Qxe5#
      • 1...Sc4
        • 2.Se2#
      • 1...Sxg4!
  • Keys
    • 1.Rf6!
      • threat
        • 2.Se6#
      • 1...S3xg4
        • 2.Bxd2#
      • 1...S5xg4
        • 2.Qc7#
      • 1...Bc8
        • 2.Se2#
      • 1...Sg2
        • 2.Rxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • B(k);N_GUARD,P_PINS(H)::S(F),XB(k)
    • B(k);N_GUARD::S(F)
    • S(e);S_CUTB(k)::S(F)
    • S(e);OGATEB,P_SPINS(e),XS(H)::B(E),XP(b)
    • S(h);S_CUTB(k)::S(F)
    • S(h);OGATEB,P_SPINS(h),XS(H)::QAB(B)
  • Tries
    • Try
      • S(H);CHECK,XS(e)
      • Refutation
        • K(f);S_FLIGHT,XS(H)
    • Try
      • B(E);P_PINS(e),XP(b)
      • Threat
        • B(E),XS(e)
      • Vars
        • P(i);OGATEB,P_SPINP(i),XS(H)::R(K)
        • S(h);S_CUTB(k)::S(F)
      • Refutation
        • S(h);XS(H)
    • Try
      • Q(B);P_PINS(h)
      • Threat
        • QAB1(B),XS(h)
      • Vars
        • S(e);S_CUTB(k)::S(F)
      • Refutation
        • S(e);N_SPINS(h),P_SPINS(e),XS(H)
  • Actual
    • R(K);P_PINP(i)
    • Threat
      • S(F)
    • Vars
      • S(e);OGATEB,P_SPINS(e),XS(H)::B(E),XP(b)
      • S(h);OGATEB,P_SPINS(h),XS(H)::QAB(B)
      • B(k);N_GUARD::S(F)
      • S(e);N_GUARD::R1(K),XP(i)
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