MESON Chess Problem Database

Problem Display
PID: 183493 (6B1/3Q1p2/2K1pp1n/3pNN2/3Pk1bp/p7/4PP2/2B3R1 w - - 0 1)

Petite, Efren

4th Comm., Olympic Ty., 1964

6B1/3Q1p2/2K1pp1n/3pNN2/3Pk1bp/p7/4PP2/2B3R1

#2

10 + 9

136 Problem Observer 2016
136 Problem Observer 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Kxf5
      • 2.Bh7#
    • 1...Sxf5
      • 2.Rxg4#
    • 1...exf5
      • 2.Qxd5#
  • Tries
    • 1.Be3?
      • threat
        • 2.Sd6#
      • 1...Kxf5
        • 2.Bh7#
      • 1...Sxf5
        • 2.Rxg4#
      • 1...exf5
        • 2.Qxd5#
      • 1...Bxf5!
    • 1.Rd1?
      • threat
        • 2.Sd6#
      • 1...Kxf5
        • 2.Bh7#
      • 1...Bxf5
        • 2.f3#
      • 1...exf5
        • 2.Qxd5#
      • 1...Sxf5!
    • 1.Rxg4+?
      • 1...Kxf5
        • 2.Bh7#
      • 1...Sxg4!
    • 1.Qxd5+?
      • 1...Kxf5
        • 2.Bh7#
        • 2.e4#
      • 1...exd5!
    • 1.Qa7?
      • threat
        • 2.Sd6#
      • 1...Kxf5
        • 2.Bh7#
      • 1...Bxf5
        • 2.f3#
      • 1...Sxf5
        • 2.Rxg4#
      • 1...exf5!
    • 1.f3+?
      • 1...Kxf5
        • 2.Bh7#
      • 1...Bxf3!
  • Keys
    • 1.Kc5!
      • threat
        • 2.Sd6#
      • 1...Kxf5
        • 2.Bh7#
      • 1...Bxf5
        • 2.f3#
      • 1...Sxf5
        • 2.Rxg4#
      • 1...exf5
        • 2.Qxd5#

This is a version

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);OGATEB,P_SPINP(f),S_FLIGHT,XS(G)::B(J)
    • S(h);N_GUARD,SBLOCK,XS(G)::R(B),XB(c)
    • P(f);N_GUARD,SBLOCK,XS(G)::QAB1(I),XP(e)
  • Tries
    • Try
      • B(A);
      • Threat
        • S(G)
      • Vars
        • K(b);OGATEB,P_SPINP(f),S_FLIGHT,XS(G)::B(J)
        • S(h);N_GUARD,SBLOCK,XS(G)::R(B),XB(c)
        • P(f);N_GUARD,SBLOCK,XS(G)::QAB1(I),XP(e)
      • Refutation
        • B(c);XS(G)
    • Try
      • R(B);
      • Threat
        • S(G)
      • Vars
        • K(b);OGATEB,P_SPINP(f),S_FLIGHT,XS(G)::B(J)
        • B(c);N_GUARD,SBLOCK,XS(G)::P(D)
        • P(f);N_GUARD,SBLOCK,XS(G)::QAB1(I),XP(e)
      • Refutation
        • S(h);XS(G)
    • Try
      • R(B);CHECK,XB(c)
      • Vars
        • K(b);P_SPINP(f),S_FLIGHT,XS(G)::B(J)
      • Refutation
        • S(h);XR(B)
    • Try
      • Q(I);CHECK,XP(e)
      • Refutation
        • P(f);XQ(I)
    • Try
      • Q(I);
      • Threat
        • S(G)
      • Vars
        • K(b);OGATEB,S_FLIGHT,XS(G)::B(J)
        • B(c);N_GUARD,SBLOCK,XS(G)::P(D)
        • S(h);N_GUARD,SBLOCK,XS(G)::R(B),XB(c)
      • Refutation
        • P(f);XS(G)
    • Try
      • P(D);CHECK
      • Vars
        • K(b);P_SPINP(f),S_FLIGHT,XS(G)::B(J)
      • Refutation
        • B(c);XP(D)
  • Actual
    • K(H);P-FLIGHT
    • Threat
      • S(G)
    • Vars
      • K(b);OGATEB,P_SPINP(f),S_FLIGHT,XS(G)::B(J)
      • B(c);N_GUARD,SBLOCK,XS(G)::P(D)
      • S(h);N_GUARD,SBLOCK,XS(G)::R(B),XB(c)
      • P(f);N_GUARD,SBLOCK,XS(G)::QAB1(I),XP(e)
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