MESON Chess Problem Database

Problem Display
PID: 228189 (1b2RK2/1Q6/3p4/r2P1p2/3kNP2/n2P4/bP1BP1B1/6q1 w - - 0 1)

Groeneveld, Cornelis

Schweizerische Schachzeitung, 1986

1b2RK2/1Q6/3p4/r2P1p2/3kNP2/n2P4/bP1BP1B1/6q1

#2

11 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qe3
      • 2.Bc3#
    • 1...Bxd5
      • 2.Qg7#
  • Tries
    • 1.Sg5?
      • threat
        • 2.Se6#
      • 1...Kc5
        • 2.Se6#
        • 2.Qb4#
      • 1...Qe3
        • 2.Bxe3#
      • 1...Bxd5!
    • 1.Qb6+?
      • 1...Kxd5
        • 2.Sc3#
        • 2.Sf6#
      • 1...Rc5!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Se6#
      • 1...Kxc5
        • 2.Qb4#
      • 1...Rxc5
        • 2.Qg7#
      • 1...Bxd5
        • 2.Qxd5#
      • 1...dxc5
        • 2.Bc3#
      • 1...Qe3
        • 2.Bxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(a);SBLOCK::B(B)
    • B(b);SBLOCK,XP(H)::QAB(I)
  • Tries
    • Try
      • S(F);
      • Threat
        • S(F)
      • Vars
        • Q(a);N_GUARD::B(B),XQ(a)
      • Refutation
        • B(b);XP(H)
    • Try
      • Q(I);CHECK
      • Refutation
        • R(e);P_SPINR(e)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • K(d);S_FLIGHT,XS(F)::QAB1(I)
      • R(e);SBLOCK,XS(F)::QAB(I)
      • B(b);OGATE,XP(H)::QAR1(I),XB(b)
      • P(g);SBLOCK,XS(F)::B(B)
      • Q(a);N_GUARD::B(B),XQ(a)
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