MESON Chess Problem Database

Problem Display
PID: 239022 (4r3/2p1Q1q1/2N1p2n/3P4/2pN1P2/2p1k1B1/2PpP2R/3K3B w - - 0 1)

Petite, Efren

Problemas, 2014

4r3/2p1Q1q1/2N1p2n/3P4/2pN1P2/2p1k1B1/2PpP2R/3K3B

#2

11 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sg4
      • 2.Sf5#
    • 1...Sf5
      • 2.Sxf5#
    • 1...Sf7
      • 2.Sf5#
    • 1...Sg8
      • 2.Sf5#
  • Tries
    • 1.Sxe6?
      • threat
        • 2.Bf2#
      • 1...Qxg3
        • 2.Qc5#
      • 1...Sg4!
  • Keys
    • 1.Qc5!
      • threat
        • 2.Sf5#
      • 1...Qxd4
        • 2.Qxd4#
      • 1...Qxg3
        • 2.Sxe6#
      • 1...Sf5
        • 2.Sxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • S(f);N_GUARD::S(G)
    • S(f);N_GUARD::S(G),XS(f)
  • Tries
    • Try
      • S(G);XP(e)
      • Threat
        • B(F)
      • Vars
        • Q(h);N_GUARD,XB(F)::QAB(K)
      • Refutation
        • S(f);
  • Actual
    • Q(K);N_PINP(e)
    • Threat
      • QAB(K)+S(G),DCHECK
    • Vars
      • Q(h);OGATE,P_SPINQ(h),XS(G)::QAB1(K),XQ(h)
      • Q(h);N_GUARD,XB(F)::QAB(K)+S(G),XP(e)
      • S(f);::QAB(K)+S(G),DCHECK,XS(f)
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