MESON Chess Problem Database

Problem Display
PID: 120942 (8/2pP4/pkB5/R1N1p2r/1pp1K2p/8/8/Q7 w - - 0 1)

Sobek, Karel

Ruch, 1948

8/2pP4/pkB5/R1N1p2r/1pp1K2p/8/8/Q7

#2

6 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Rb5+?
      • 1...Kxc6
        • 2.Qxa6#
      • 1...Ka7
        • 2.Qxa6#
      • 1...axb5!
    • 1.Qxe5?
      • threat
        • 2.Rxa6#
      • 1...Kxa5
        • 2.Qxc7#
      • 1...Kxc6
        • 2.Qf6#
        • 2.Qe6#
      • 1...Ka7
        • 2.Qxc7#
      • 1...Rxe5+!
  • Keys
    • 1.Qg1!
      • threat
        • 2.Rxa6#
      • 1...Kxa5
        • 2.Sb7#
      • 1...Kxc6
        • 2.Qg6#
      • 1...Ka7
        • 2.Sxa6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • K(g);P-FLIGHT,XB(E)::QAR2(A),XP(f)
        • K(g);P_SPINP(f),S_FLIGHT::QAR1(A),XP(f)
      • Refutation
        • P(f);XR(C)
    • Try
      • Q(A);XP(d)
      • Threat
        • R1(C),XP(f)
      • Vars
        • K(g);S_FLIGHT,XR(C)::QAB(A),XP(h)
        • K(g);P_SPINP(f),S_FLIGHT::QAR2(A),XP(h)
      • Refutation
        • R(e);CHECK,XQ(A)
  • Actual
    • Q(A);
    • Threat
      • R1(C),XP(f)
    • Vars
      • K(g);S_FLIGHT,XR(C)::S(D)
      • K(g);OGATEB,P-FLIGHT,XB(E)::QAR(A)
      • K(g);P_SPINP(f),S_FLIGHT::QAB(A)+S(D),XP(f)
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