MESON Chess Problem Database

Problem Display
PID: 110868 (b7/2p5/2R2N2/K1p2p2/N2k4/6P1/2p1Q3/2rr2b1 w - - 0 1)

Einat, Paz

Shahmat, 1983

b7/2p5/2R2N2/K1p2p2/N2k4/6P1/2p1Q3/2rr2b1

#2

6 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...c4
      • 2.Rxc4#
    • 1...f4
      • 2.Qe4#
  • Tries
    • 1.Rxc5?
      • threat
        • 2.Rc4#
      • 1...Rd3
        • 2.Qe5#
      • 1...Be3
        • 2.Qc4#
      • 1...Bd5
        • 2.Rxd5#
      • 1...Be4!
    • 1.Rd6+?
      • 1...Bd5
        • 2.Rxd5#
      • 1...cxd6!
    • 1.Qd2+?
      • 1...Kc4
        • 2.Qc3#
      • 1...Ke5
        • 2.Qf4#
      • 1...Rxd2!
  • Keys
    • 1.Qf3!
      • threat
        • 2.Qc3#
      • 1...Kc4
        • 2.Qc3#
      • 1...Ke5
        • 2.Qf4#
      • 1...Be3
        • 2.Qd5#
      • 1...Rd3
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • P(f);OGATE::R1(E),XP(f)
    • P(g);N_GUARD::QAR1(A)
  • Tries
    • Try
      • R(E);XP(f)
      • Threat
        • R1(E)
      • Vars
        • R(b);SBLOCK::QAB1(A)
        • B(c);SBLOCK::QAR1(A)
        • B(i);N_GUARD::R1(E),XB(i)
      • Refutation
        • B(i);
    • Try
      • R(E);CHECK
      • Vars
        • B(i);N_GUARD,P_SPINB(i)::R1(E),XB(i)
      • Refutation
        • P(h);XR(E)
    • Try
      • Q(A);CHECK
      • Vars
        • K(e);P-FLIGHT,P_SPINP(f)::QAR1(A)
        • K(e);S_FLIGHT::QAB1(A)
      • Refutation
        • R(b);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • K(e);P-FLIGHT,P_SPINP(f)::QAR1(A)
      • K(e);S_FLIGHT::QAB1(A)
      • B(c);SBLOCK::QAR1(A)
      • R(b);SBLOCK::QAR2(A)
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