MESON Chess Problem Database

Problem Display
PID: 169118 (nkN5/1ppB3K/RpQ5/3N4/1R6/8/8/8 w - - 0 1)

Janevski, Zivko

1/2 Comm., SuperProblem 087. TT, 2013

nkN5/1ppB3K/RpQ5/3N4/1R6/8/8/8

#2

7 + 5

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Sd6?
      • threat
        • 2.Qxb7#
      • 1...bxa6
        • 2.Qb7#
      • 1...cxd6
        • 2.Qc8#
      • 1...bxc6!
    • 1.Rbxb6?
      • threat
        • 2.Rxb7#
        • 2.Qxb7#
      • 1...Sxb6
        • 2.Qxc7#
      • 1...cxb6!
  • Keys
    • 1.Scxb6!
      • threat
        • 2.Rxa8#
      • 1...Sxb6
        • 2.Qxc7#
      • 1...bxa6
        • 2.Qxa8#
      • 1...bxc6
        • 2.Sxa8#
      • 1...cxb6
        • 2.Qc8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(G);
      • Threat
        • QAR1(D),XP(b)
      • Vars
        • P(b);P_SPINP(a),XR(C)::QAR1(D)
        • P(c);OGATE,XS(G)::QAR1(D)
      • Refutation
        • P(b);P_SPINP(a),XQ(D)
    • Try
      • R(A);P_PINP(b),XP(a)
      • Threat
        • DUALS(2)
      • Vars
        • S(d);N_GUARD,N_SPINP(b),XR(A)::QAB1(D),XP(c)
      • Refutation
        • P(c);N_SPINP(b),XR(A)
  • Actual
    • S(G);XP(a)
    • Threat
      • R1(C),XS(d)
    • Vars
      • S(d);N_GUARD,XS(G)::QAB1(D),XP(c)
      • P(b);OGATE,XR(C)::QAR1(D),XS(d)
      • P(b);XQ(D)::R(A)+S(G),XS(d)
      • P(c);OGATE,XS(G)::QAR1(D)
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