MESON Chess Problem Database

Problem Display
PID: 22570 (2Q2R2/5n1p/8/3pNPNp/3B1k1P/1p6/3R3K/7n w - - 0 1)

Groeneveld, Cornelis

HM., Schulte MT, 1992

2Q2R2/5n1p/8/3pNPNp/3B1k1P/1p6/3R3K/7n

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Sf2
      • 2.Rxf2#
    • 1...Sg3
      • 2.Rf2#
  • Tries
    • 1.Sg6+?
      • 1...Kg4
        • 2.f6#
      • 1...hxg6!
    • 1.Be3+?
      • 1...Kxe5
        • 2.Qe6#
      • 1...Kxe3!
    • 1.Re2?
      • threat
        • 2.Sh3#
      • 1...Sxg5
        • 2.Qc1#
      • 1...Sf2
        • 2.Rxf2#
      • 1...Sxe5!
    • 1.Rg2?
      • threat
        • 2.Sd3#
      • 1...Sxe5
        • 2.Qc1#
      • 1...Sf2
        • 2.Rxf2#
      • 1...Sg3
        • 2.Rf2#
      • 1...Sxg5!
    • 1.Qc3?
      • threat
        • 2.Qf3#
      • 1...Kxf5
        • 2.Rxf7#
        • 2.Qf3#
      • 1...Sxg5
        • 2.Qe3#
      • 1...Sxe5!
  • Keys
    • 1.Qc1!
      • threat
        • 2.Rf2#
      • 1...Kxf5
        • 2.Rxf7#
      • 1...Sxe5
        • 2.Rg2#
      • 1...Sxg5
        • 2.Re2#
      • 1...Sf2
        • 2.Rxf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(a);N_GUARD::R(A),XS(a)
    • S(a);N_GUARD::R(A)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(c);P-FLIGHT::QAB(H)+P(F)
      • Refutation
        • P(g);XS(E)
    • Try
      • B(C);CHECK
      • Vars
        • K(c);S_FLIGHT,XS(E)::QAR1(H)
      • Refutation
        • K(c);S_FLIGHT,XB(C)
    • Try
      • R(A);
      • Threat
        • S(G)
      • Vars
        • S(f);XS(G)::QAB(H)
        • S(a);N_GUARD::R(A),XS(a)
      • Refutation
        • S(f);XS(E)
    • Try
      • R(A);
      • Threat
        • S(E)
      • Vars
        • S(f);XS(E)::QAB(H)
        • S(a);N_GUARD::R(A),XS(a)
        • S(a);N_GUARD::R(A)
      • Refutation
        • S(f);XS(G)
    • Try
      • Q(H);
      • Threat
        • QAR1(H)
      • Vars
        • S(f);XS(G)::QAB1(H)
      • Refutation
        • S(f);XS(E)
  • Actual
    • Q(H);
    • Threat
      • QAB(H)+R(A),DCHECK
    • Vars
      • K(c);OGATEB,P-FLIGHT,P_SPINS(f),XP(F)::R(I),XS(f)
      • S(f);XS(E)::QAB(H)+R(A)
      • S(f);XS(G)::QAB(H)+R(A)
      • S(a);::QAB(H)+R(A),DCHECK,XS(a)
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