MESON Chess Problem Database

Problem Display
PID: 15244 (1qBr1R2/N2pN1pp/1b1k2bR/4p3/4Q2B/4P3/1P6/1K6 w - - 0 1)

Lender, Baruch

Sp. Prize, Rochade TT, 1981-1982

1qBr1R2/N2pN1pp/1b1k2bR/4p3/4Q2B/4P3/1P6/1K6

#2

10 + 9

3841 The Art of Israeli Chess Composition 1983

SOLUTION

  • SOUND
  • Sets
    • 1...Kc7
      • 2.Sb5#
  • Tries
    • 1.Sb5+?
      • 1...Ke6
        • 2.Qf5#
      • 1...Kc5!
    • 1.Rxg6+?
      • 1...Kc5
        • 2.b4#
      • 1...Kc7
        • 2.Sb5#
        • 2.Sd5#
      • 1...hxg6!
    • 1.Rf5?
      • threat
        • 2.Qxe5#
      • 1...Kc5
        • 2.Qd4#
      • 1...Ke6
        • 2.Qd5#
      • 1...Kc7
        • 2.Sb5#
      • 1...Bd4!
  • Keys
    • 1.Sf5+!
      • 1...Kc5
        • 2.b4#
      • 1...Ke6
        • 2.Qc4#
      • 1...Kc7
        • 2.Bxd8#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(c);N_SPINB(d),S_FLIGHT::S(G)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(c);P-FLIGHT,P_SPINP(a)::QAB1(D)
      • Refutation
        • K(c);N_SPINB(d),S_FLIGHT
    • Try
      • R(F);CHECK,N_SPINQ(D),XB(d)
      • Vars
        • K(c);S_FLIGHT::P(B)
      • Refutation
        • P(g);XR(F)
    • Try
      • R(J);N_SPINQ(D)
      • Threat
        • QAB1(D),XP(a)
      • Vars
        • K(c);N_SPINB(d),P_SPINP(a),S_FLIGHT::QAB1(D)
        • K(c);P-FLIGHT,P_SPINP(a)::QAB1(D)
        • K(c);N_SPINB(d),S_FLIGHT::S(G)
      • Refutation
        • B(b);P_PINP(B)
  • Actual
    • S(H);CHECK,N_SPINQ(D)
    • Vars
      • K(c);N_SPINB(d),S_FLIGHT::P(B)
      • K(c);P-FLIGHT,P_SPINP(a)::QAB(D)
      • K(c);N_SPINB(d),S_FLIGHT::B(E),XR(i)
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