MESON Chess Problem Database

Problem Display
PID: 180578 (3K4/8/PkN5/2p4P/1N1R4/8/4B1P1/7Q w - - 0 1)

Labai, Zoltan

Sachmatija, 2016

3K4/8/PkN5/2p4P/1N1R4/8/4B1P1/7Q

#2

9 + 2

5454 Near Snap 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Rd5?
      • 1...c4
        • 2.Qg1#
      • 1...cxb4!
    • 1.Rd6?
      • threat
        • 2.Sd5#
      • 1...cxb4
        • 2.Qg1#
      • 1...c4!
    • 1.Qc1?
      • 1...cxb4
        • 2.Rxb4#
      • 1...cxd4
        • 2.Sd5#
      • 1...c4!
  • Keys
    • 1.Qg1!
      • 1...cxb4
        • 2.Rd6#
      • 1...cxd4
        • 2.Qxd4#
      • 1...c4
        • 2.Rd5#

Anticipated by 51724(1998)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(E);
      • Vars
        • P(a);OGATEB::QAB(A)
      • Refutation
        • P(a);XS(D)
    • Try
      • R(E);
      • Threat
        • S(D)
      • Vars
        • P(a);OGATEB,XS(D)::QAB(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Vars
        • P(a);OGATE,XS(D)::R(E),XP(a)
        • P(a);XR(E)::S(D)
      • Refutation
        • P(a);
  • Actual
    • Q(A);
    • Vars
      • P(a);OGATEB,XS(D)::QAB(A)+R(E)
      • P(a);OGATE,P_SPINP(a),XR(E)::QAB(A),XP(a)
      • P(a);OGATEB::QAB(A)+R(E)
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