MESON Chess Problem Database

Problem Display
PID: 235646 (3K4/2PPP3/1nNkP3/R2N4/3R4/8/8/3Q4 w - - 0 1)

Groeneveld, Cornelis

Mat, 1982

3K4/2PPP3/1nNkP3/R2N4/3R4/8/8/3Q4

#2

10 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qh1?
      • 1...Kxc6
        • 2.Sb4#
      • 1...Sxd5
        • 2.Qxd5#
      • 1...Sxd7
        • 2.Sf4#
      • 1...Sa4
        • 2.Sf4#
      • 1...Sc4
        • 2.Sf4#
      • 1...Sa8
        • 2.Sf4#
      • 1...Sc8
        • 2.Sf4#
      • 1...Kxe6!
  • Keys
    • 1.Qf3!
      • 1...Kxc6
        • 2.Sb4#
      • 1...Kxe6
        • 2.Qf6#
      • 1...Sxd5
        • 2.Qxd5#
      • 1...Sxd7
        • 2.Sf4#
      • 1...Sa4
        • 2.Sf4#
      • 1...Sc4
        • 2.Sf4#
      • 1...Sa8
        • 2.Sf4#
      • 1...Sc8
        • 2.Sf4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Vars
        • K(b);P-FLIGHT,XS(E)::QAB(A)+S(D),DCHECK
        • S(a);OGATE,P_SPINS(a),XS(D)::QAR1(A),XS(a)
        • S(a);N_GUARD,XP(H)::R(B)+S(D)
        • S(a);N_GUARD::R(B)+S(D)
      • Refutation
        • K(b);P-FLIGHT,XP(F)
  • Actual
    • Q(A);
    • Vars
      • K(b);P-FLIGHT,XS(E)::QAB(A)+S(D),DCHECK
      • K(b);OGATEB,P-FLIGHT,XP(F)::QAR1(A)
      • S(a);OGATE,P_SPINS(a),XS(D)::QAR1(A),XS(a)
      • S(a);N_GUARD,XP(H)::R(B)+S(D)
      • S(a);N_GUARD::R(B)+S(D)
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