MESON Chess Problem Database

Problem Display
PID: 109599 (8/1r6/R7/pk1PN3/R7/1N1P4/8/1Q1K4 w - - 0 1)

Valuska, Jan

Sal'a-Zvolen, 1988

8/1r6/R7/pk1PN3/R7/1N1P4/8/1Q1K4

#2

8 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rb6
      • 2.R6xa5#
  • Tries
    • 1.Sxa5+?
      • 1...Kxa4
        • 2.Sac4#
        • 2.Sac6#
        • 2.Sxb7#
      • 1...Kxa6
        • 2.Sac4#
        • 2.Sac6#
        • 2.Sxb7#
        • 2.Qxb7#
      • 1...Kc5!
    • 1.Sc4?
      • threat
        • 2.R6xa5#
      • 1...Kxa4
        • 2.Sc5#
      • 1...Kxa6
        • 2.Rxa5#
      • 1...Ra7!
  • Keys
    • 1.Sc6!
      • threat
        • 2.R4xa5#
      • 1...Kxa4
        • 2.Rxa5#
      • 1...Kxa6
        • 2.Sc5#

This is a version of 109597

FEATURES

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