MESON Chess Problem Database

Problem Display
PID: 138314 (1b2q3/4P3/2p2Nbn/8/3P1k2/3r1N1Q/3p1BPK/5R2 w - - 0 1)

Rice, John Michael

3rd Prize, Wola Gulowska, 2009

1b2q3/4P3/2p2Nbn/8/3P1k2/3r1N1Q/3p1BPK/5R2

#2

9 + 8

56 The Problemist 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Re3
      • 2.Bg3#
    • 1...Bf5
      • 2.Qg3#
      • 2.Qxh6#
    • 1...Sg4+
      • 2.Qxg4#
    • 1...Sf5
      • 2.Qg4#
    • 1...Sf7
      • 2.Qg4#
    • 1...Sg8
      • 2.Qg4#
  • Tries
    • 1.Bg1?
      • threat
        • 2.g3#
      • 1...Sg4+
        • 2.Qxg4#
      • 1...Sf5
        • 2.Qg4#
      • 1...Rxf3!
    • 1.Be3+?
      • 1...Rxe3
        • 2.g3#
      • 1...Kxe3+!
    • 1.Qh4+?
      • 1...Sg4+
        • 2.Qxg4#
      • 1...Kf5+!
    • 1.g4?
      • threat
        • 2.Qg3#
      • 1...Sxg4+
        • 2.Qxg4#
      • 1...Rxf3
        • 2.Qxh6#
      • 1...Sf5!
  • Keys
    • 1.Qe6!
      • threat
        • 2.Bg3#
      • 1...Sg4+
        • 2.Qxg4#
      • 1...Rxf3
        • 2.Be3#
      • 1...Be4
        • 2.Qxe4#
      • 1...Be5
        • 2.Qxe5#
      • 1...Sf5
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • R(b);SBLOCK::B(B)
    • S(f);CHECK,N_GUARD::QAR1(F),XS(f)
    • S(f);N_GUARD::QAR1(F)
  • Tries
    • Try
      • B(B);
      • Threat
        • P(C)
      • Vars
        • S(f);CHECK,N_GUARD::QAR1(F),XS(f)
        • S(f);N_GUARD::QAR1(F)
      • Refutation
        • R(b);P_SPINR(b),XS(E)
    • Try
      • B(B);CHECK
      • Vars
        • R(b);SBLOCK,XB(B)::P(C)
      • Refutation
        • K(c);CHECK,S_FLIGHT,XB(B)
    • Try
      • Q(F);CHECK
      • Vars
        • S(f);CHECK,N_GUARD,P_SPINS(f)::QAR1(F),XS(f)
      • Refutation
        • K(c);CHECK,P-FLIGHT
    • Try
      • P(C);
      • Threat
        • QAB1(F)
      • Vars
        • S(f);CHECK,OGATE,XP(C)::QAR1(F),XS(f)
        • R(b);SBLOCK,XS(E)::QAB(F),XS(f)
      • Refutation
        • S(f);
  • Actual
    • Q(F);
    • Threat
      • B(B)
    • Vars
      • S(f);CHECK,N_GUARD::QAR1(F),XS(f)
      • R(b);N_GUARD,XS(E)::B(B)
      • B(e);N_GUARD::QAR1(F),XB(e)
      • B(g);N_GUARD::QAB1(F),XB(g)
      • S(f);S_CUTB(e)::QAR1(F)
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