MESON Chess Problem Database

Problem Display
PID: 65417 (1B4B1/1pN3N1/1q4pb/R3P3/2Rpkp2/5p2/4PK2/1n4Q1 w - - 0 1)

Gvozdjak, Peter

2nd Sp. Prize, Bertin MT, 1991

1B4B1/1pN3N1/1q4pb/R3P3/2Rpkp2/5p2/4PK2/1n4Q1

#2

10 + 9

702 Phenix 1991
56 The Problemist 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Qa7
      • 2.Qxb1#
      • 2.Qxg6#
    • 1...Qxc7
      • 2.Qxb1#
      • 2.Qxg6#
    • 1...Qb2
      • 2.Qxg6#
    • 1...Qb3
      • 2.Qxg6#
    • 1...Qb4
      • 2.Qxg6#
    • 1...Qa6
      • 2.Qxb1#
    • 1...Qc6
      • 2.Qxb1#
    • 1...Qd6
      • 2.Qxb1#
    • 1...Qe6
      • 2.Qxb1#
    • 1...Qf6
      • 2.Qxb1#
  • Tries
    • 1.Sb5?
      • threat
        • 2.Qxb1#
      • 1...Qxb5
        • 2.Qxg6#
      • 1...Qd6
        • 2.Sxd6#
      • 1...Qe6
        • 2.Rxd4#
      • 1...Sd2
        • 2.Sc3#
      • 1...Sa3
        • 2.Sc3#
      • 1...Sc3
        • 2.Sxc3#
      • 1...Qc7!
    • 1.Qd1?
      • threat
        • 2.Qc2#
        • 2.Qd3#
        • 2.exf3#
      • 1...Qxa5
        • 2.Qxd4#
      • 1...Bxg7
        • 2.Qc2#
        • 2.Qd3#
      • 1...fxe2
        • 2.Qc2#
        • 2.Qxe2#
      • 1...Qb5
        • 2.Qxd4#
      • 1...Qb2
        • 2.Qd3#
      • 1...Qb3
        • 2.Rxd4#
        • 2.Qxd4#
      • 1...Sd2
        • 2.Qc2#
      • 1...Sa3
        • 2.Qd3#
        • 2.exf3#
      • 1...Qc5!
  • Keys
    • 1.Sce6!
      • threat
        • 2.Qxg6#
      • 1...Qxa5
        • 2.Rxd4#
      • 1...Qxe6
        • 2.Qxb1#
      • 1...Qc5
        • 2.Sxc5#
      • 1...Qb5
        • 2.Rxd4#
      • 1...Bg5
        • 2.Sxg5#
      • 1...g5
        • 2.Bh7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 7
  • Sets
    • Q(f);N_GUARD,P_PINP(B)::QAB(A),XP(g)
    • Q(f);N_GUARD::QAB(A),XP(g)
    • Q(f);N_GUARD::QAB(A),XS(a)
  • Tries
    • Try
      • S(G);
      • Threat
        • QAB(A),XS(a)
      • Vars
        • Q(f);N_GUARD,XS(G)::QAB(A),XP(g)
        • Q(f);N_GUARD::S(G),XQ(f)
        • Q(f);N_GUARD::R1(D),XP(c)
        • S(a);N_GUARD::S(G)
        • S(a);N_GUARD::S(G),XS(a)
      • Refutation
        • Q(f);
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • Q(f);N_GUARD,XR(E)::QAR1(A),XP(c)
        • Q(f);N_GUARD::QAR1(A),XP(c)
        • Q(f);P_PINP(B)::QAB1(A)
        • S(a);::QAB(A)
      • Refutation
        • Q(f);
  • Actual
    • S(G);
    • Threat
      • QAB(A),XP(g)
    • Vars
      • Q(f);N_GUARD,XR(E)::R1(D),XP(c)
      • Q(f);N_GUARD,XS(G)::QAB(A),XS(a)
      • Q(f);N_GUARD::S(G),XQ(f)
      • Q(f);N_GUARD::R1(D),XP(c)
      • B(h);N_GUARD::S(G),XB(h)
      • P(g);OGATEB::B(J)
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