MESON Chess Problem Database

Problem Display
PID: 237491 (8/8/8/n7/2P2n2/2Pp4/RNPk4/1Q1N1K2 w - - 0 1)

Labai, Zoltan

Pat a Mat, 2019

8/8/8/n7/2P2n2/2Pp4/RNPk4/1Q1N1K2

#2

8 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sxc4
      • 2.Sxc4#
  • Tries
    • 1.Sxd3?
      • threat
        • 2.Qc1#
      • 1...Sxd3
        • 2.cxd3#
      • 1...Sb3
        • 2.cxb3#
      • 1...Se2!
    • 1.Sa4?
      • threat
        • 2.cxd3#
      • 1...dxc2
        • 2.Qxc2#
      • 1...Sxc4!
  • Keys
    • 1.cxd3!
      • threat
        • 2.Sa4#
      • 1...Sxd3
        • 2.Sxd3#
      • 1...Sxc4
        • 2.Sxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(d);XP(H)::S(E),XS(d)
  • Tries
    • Try
      • S(E);XP(b)
      • Threat
        • QAB1(A)
      • Vars
        • S(c);OGATE,XS(E)::R(D)+P(F),XS(c)
        • S(d);OGATE::R(D)+P(F),XS(d)
      • Refutation
        • S(c);
    • Try
      • S(E);
      • Threat
        • R(D)+P(F),XP(b)
      • Vars
        • P(b);OGATE,P_SPINP(b),XP(F)::QAR1(A),XP(b)
      • Refutation
        • S(d);XP(H)
  • Actual
    • P(F);XP(b)
    • Threat
      • R(D)+S(E)
    • Vars
      • S(c);XP(F)::R(D)+S(E),XS(c)
      • S(d);XP(H)::R(D)+S(E),DCHECK,XS(d)
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