MESON Chess Problem Database

Problem Display
PID: 176439 (3K4/8/pP4p1/pk1P3Q/N1p5/p1P5/P1B3p1/3r4 w - - 0 1)

Giegold, Fritz Emil

Schach-Echo, 1963

3K4/8/pP4p1/pk1P3Q/N1p5/p1P5/P1B3p1/3r4

#2

8 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd5+
      • 2.Qxd5#
    • 1...g5
      • 2.Qe8#
  • Tries
    • 1.Qxg6?
      • threat
        • 2.Qe8#
        • 2.Qc6#
      • 1...Re1
        • 2.Qc6#
      • 1...Rxd5+!
    • 1.Qe5?
      • threat
        • 2.Qe8#
      • 1...Rxd5+
        • 2.Qxd5#
      • 1...Re1!
    • 1.Qf5?
      • threat
        • 2.Qd7#
      • 1...Rxd5+
        • 2.Qxd5#
      • 1...gxf5!
  • Keys
    • 1.Bf5!
      • threat
        • 2.Bd7#
      • 1...Kxa4
        • 2.Bd7#
      • 1...gxf5
        • 2.Qe8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(a);CHECK,OGATE,P_SPINR(a),XP(E)::QAR2(F),XR(a)
    • P(h);OGATE::QAB(F)
  • Tries
    • Try
      • Q(F);XP(h)
      • Threat
        • DUALS(2)
      • Vars
        • R(a);N_PINP(E)::QAB1(F)
      • Refutation
        • R(a);CHECK,XP(E)
    • Try
      • Q(F);
      • Threat
        • QAB(F)
      • Vars
        • R(a);CHECK,OGATE,P_SPINR(a),XP(E)::QAR2(F),XR(a)
      • Refutation
        • R(a);N_PINP(E)
    • Try
      • Q(F);
      • Threat
        • QAB(F)
      • Vars
        • R(a);CHECK,OGATE,P_SPINR(a),XP(E)::QAR2(F),XR(a)
      • Refutation
        • P(h);XQ(F)
  • Actual
    • B(B);
    • Threat
      • B(B)
    • Vars
      • K(f);S_FLIGHT,XS(D)::B(B)
      • P(h);OGATE,XB(B)::QAB(F)
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