MESON Chess Problem Database

Problem Display
PID: 201641 (8/8/8/8/pbP2p2/QN3k1B/2PB1P2/4K3 w - - 0 1)

Merenyi, Lajos

Nepszava, 1922

8/8/8/8/pbP2p2/QN3k1B/2PB1P2/4K3

#2

8 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd2+
      • 2.Sxd2#
    • 1...Bc5
      • 2.Sxc5#
    • 1...Bd6
      • 2.Sc5#
    • 1...Be7
      • 2.Sc5#
    • 1...Bf8
      • 2.Sc5#
    • 1...axb3
      • 2.Qa8#
  • Tries
    • 1.Sc5+?
      • 1...Bc3
        • 2.Qxc3#
      • 1...Bxa3!
    • 1.Bxb4?
      • threat
        • 2.Sd2#
        • 2.Sc5#
      • 1...axb3
        • 2.Qa8#
      • 1...Ke4!
    • 1.Qxa4?
      • threat
        • 2.Qc6#
        • 2.Qa8#
      • 1...Bxd2+
        • 2.Sxd2#
      • 1...Ba5
        • 2.Qc6#
      • 1...Ke4!
  • Keys
    • 1.Bc3!
      • threat
        • 2.Sd2#
      • 1...Ke4
        • 2.Sd2#
      • 1...axb3
        • 2.Qa8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • B(c);CHECK,XB(C)::QAR(E)+S(F),DCHECK,XB(c)
    • B(c);N_GUARD,N_PINB(C)::QAR(E)+S(F),XB(c)
    • B(c);N_GUARD,N_PINB(C)::QAR(E)+S(F)
    • P(b);OGATE,P_SPINP(b),XS(F)::QAB(E)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • B(c);N_GUARD,P_SPINB(c)::QAR(E),XB(c)
      • Refutation
        • B(c);N_PINB(C),XQ(E)
    • Try
      • B(C);N_SPINB(C),XB(c)
      • Threat
        • DUALS(2)
      • Vars
        • P(b);OGATE,P_SPINP(b),XS(F)::QAB(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);XP(b)
      • Threat
        • DUALS(2)
      • Vars
        • B(c);CHECK,XB(C)::S(F),XB(c)
        • B(c);::QAB(E)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • B(C);
    • Threat
      • S(F)
    • Vars
      • K(a);S_FLIGHT::S(F)
      • P(b);OGATE,XS(F)::QAB(E)
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