MESON Chess Problem Database

Problem Display
PID: 66118 (5R2/4k1P1/n7/1n6/2pPq3/2Q2pBB/5p2/1b2R1bK w - - 0 1)

Groeneveld, Cornelis

Prins, Hendrik

4th Prize, Wola Gulowska, 1998

5R2/4k1P1/n7/1n6/2pPq3/2Q2pBB/5p2/1b2R1bK

#2

8 + 9

15345 Wola Gulowska Award 1998

SOLUTION

  • SOUND
  • Sets
    • 1...Ba2
      • 2.Rxe4#
    • 1...Sd6
      • 2.Bh4#
  • Tries
    • 1.Qa5?
      • threat
        • 2.Qd8#
      • 1...Sbc7
        • 2.Qg5#
      • 1...Sac7!
    • 1.Qe3?
      • threat
        • 2.Qg5#
      • 1...Qe5
        • 2.Qxe5#
      • 1...Qe6
        • 2.Qxe6#
      • 1...Qxe3!
    • 1.Qxc4?
      • threat
        • 2.Qf7#
      • 1...Qe6
        • 2.Qxe6#
      • 1...Ba2
        • 2.Rxe4#
      • 1...Sd6
        • 2.Bh4#
      • 1...Qe5!
    • 1.d5?
      • threat
        • 2.Qf6#
      • 1...Sxc3
        • 2.d6#
      • 1...Qe5
        • 2.Qxe5#
      • 1...Sd4
        • 2.d6#
      • 1...Qe6!
    • 1.g8Q?
      • threat
        • 2.Rf7#
        • 2.Qf7#
        • 2.Qg7#
      • 1...Sd6
        • 2.Bh4#
      • 1...Qe5!
  • Keys
    • 1.Qxf3!
      • threat
        • 2.g8S#
      • 1...Qe5
        • 2.Qf6#
      • 1...Qe6
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • B(a);N_GUARD::R(A),XQ(f)
    • S(g);SBLOCK::B(D)
  • Tries
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • S(g);OGATE::QAB(C)
      • Refutation
        • S(h);
    • Try
      • Q(C);
      • Threat
        • QAB(C)
      • Vars
        • Q(f);OGATE::QAR2(C),XQ(f)
        • Q(f);OGATE::QAR1(C),XQ(f)
      • Refutation
        • Q(f);XQ(C)
    • Try
      • Q(C);XP(e)
      • Threat
        • QAR1(C)
      • Vars
        • Q(f);N_GUARD::QAR1(C),XQ(f)
        • B(a);N_GUARD::R(A),XQ(f)
        • S(g);SBLOCK::B(D)
      • Refutation
        • Q(f);
    • Try
      • P(F);
      • Threat
        • QAB1(C)
      • Vars
        • S(g);N_GUARD,XQ(C)::P(F)
        • Q(f);N_GUARD::QAR2(C),XQ(f)
        • S(g);N_GUARD::P(F)
      • Refutation
        • Q(f);
    • Try
      • P(G);
      • Threat
        • DUALS(3)
      • Vars
        • S(g);SBLOCK::B(D)
      • Refutation
        • Q(f);
  • Actual
    • Q(C);P_SPINQ(C),XP(d)
    • Threat
      • P=S
    • Vars
      • Q(f);N_PINQ(C)::QAB1(C)
      • Q(f);N_PINQ(C)::QAR1(C)
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