MESON Chess Problem Database

Problem Display
PID: 84898 (6br/K1p1p3/2R3B1/1kN1pQ2/2N3r1/2B2p1q/8/8 w - - 0 1)

Petite, Efren

US Problem Bulletin, 1990

6br/K1p1p3/2R3B1/1kN1pQ2/2N3r1/2B2p1q/8/8

#2

7 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc4
      • 2.Qd3#
  • Tries
    • 1.Be8?
      • threat
        • 2.Sa3#
      • 1...Kxc4
        • 2.Qd3#
      • 1...Rxc4
        • 2.Rxc7#
      • 1...Bxc4!
    • 1.Qb1+?
      • 1...Kxc4
        • 2.Qd3#
        • 2.Qb3#
      • 1...Kxc6!
    • 1.Qd7?
      • threat
        • 2.Sa3#
      • 1...Kxc4
        • 2.Qd3#
      • 1...Bxc4
        • 2.Rxc7#
      • 1...Rxc4!
  • Keys
    • 1.Rxc7!
      • threat
        • 2.Sa3#
      • 1...Kxc4
        • 2.Qd3#
      • 1...Rxc4
        • 2.Be8#
      • 1...Bxc4
        • 2.Qd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(d);OGATEB,S_FLIGHT,XS(B)::QAB1(D)
  • Tries
    • Try
      • B(F);
      • Threat
        • S(B)
      • Vars
        • K(d);OGATEB,S_FLIGHT,XS(B)::QAB1(D)
        • R(c);SBLOCK,XS(B)::B(F)+R(E),XP(f)
      • Refutation
        • B(h);XS(B)
    • Try
      • Q(D);CHECK
      • Refutation
        • K(d);S_FLIGHT,XR(E)
    • Try
      • Q(D);
      • Threat
        • S(B)
      • Vars
        • K(d);OGATEB,S_FLIGHT,XS(B)::QAB1(D)
        • B(h);SBLOCK,XS(B)::QAB(D)+R(E),XP(f)
      • Refutation
        • R(c);XS(B)
  • Actual
    • R(E);XP(f)
    • Threat
      • S(B)
    • Vars
      • K(d);OGATEB,S_FLIGHT,XS(B)::QAB1(D)
      • R(c);SBLOCK,XS(B)::B(F)
      • B(h);SBLOCK,XS(B)::QAB(D)
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