MESON Chess Problem Database

Problem Display
PID: 109597 (1r6/8/R7/pk1BN3/R7/1N6/8/1Q1K4 w - - 0 1)

Valuska, Jan

Salta Zvolen, 1988

1r6/8/R7/pk1BN3/R7/1N6/8/1Q1K4

#2

7 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rb6
      • 2.R6xa5#
  • Tries
    • 1.Sxa5+?
      • 1...Kxa4
        • 2.Sac4#
        • 2.Sac6#
        • 2.Sb7#
      • 1...Kxa6
        • 2.Sac4#
        • 2.Sac6#
        • 2.Sb7#
      • 1...Kc5!
    • 1.Sd3?
      • threat
        • 2.Sbc5#
        • 2.R4xa5#
      • 1...Kxa4
        • 2.Rxa5#
      • 1...Kxa6!
    • 1.Sc4?
      • threat
        • 2.R6xa5#
      • 1...Kxa4
        • 2.Sc5#
      • 1...Kxa6
        • 2.Rxa5#
      • 1...Ra8!
    • 1.Sd7?
      • threat
        • 2.Sbc5#
        • 2.R6xa5#
      • 1...Kxa6
        • 2.Rxa5#
      • 1...Ra8
        • 2.Sbc5#
      • 1...Kxa4!
    • 1.Qe4?
      • threat
        • 2.R4xa5#
        • 2.Qc4#
      • 1...Rc8
        • 2.R4xa5#
      • 1...Kxa6!
    • 1.Qg6?
      • threat
        • 2.R6xa5#
        • 2.Qc6#
      • 1...Rb6
        • 2.R6xa5#
      • 1...Rc8
        • 2.R6xa5#
      • 1...Ra8
        • 2.Qc6#
      • 1...Kxa4!
  • Keys
    • 1.Sc6!
      • threat
        • 2.R4xa5#
      • 1...Kxa4
        • 2.Rxa5#
      • 1...Kxa6
        • 2.Sc5#

There are these versions: 109599

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(c);SBLOCK::R1(G),XP(a)
  • Tries
    • Try
      • S(C);CHECK,XP(a)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • S(F);
      • Threat
        • DUALS(2)
      • Vars
        • K(b);P_SPINP(a),S_FLIGHT,XR(D)::R1(G),XP(a)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT,XR(G)
    • Try
      • S(F);
      • Threat
        • R1(G),XP(a)
      • Vars
        • K(b);P_SPINP(a),S_FLIGHT,XR(D)::S(C)
        • K(b);P_SPINP(a),S_FLIGHT,XR(G)::R1(D),XP(a)
      • Refutation
        • R(c);
    • Try
      • S(F);
      • Threat
        • DUALS(2)
      • Vars
        • K(b);P_SPINP(a),S_FLIGHT,XR(G)::R1(D),XP(a)
        • R(c);::QAR(A)+S(C)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT,XR(D)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(c);::R1(D),XP(a)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT,XR(G)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(c);::R1(G),XP(a)
        • R(c);::QAB1(A)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT,XR(D)
  • Actual
    • S(F);
    • Threat
      • R1(D),XP(a)
    • Vars
      • K(b);P_SPINP(a),S_FLIGHT,XR(D)::R1(G),XP(a)
      • K(b);P_SPINP(a),S_FLIGHT,XR(G)::S(C)
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