MESON Chess Problem Database

Problem Display
PID: 142568 (4K1R1/pp2pN2/4kb2/1p1pP2r/6q1/B5NB/5Q1n/3r2n1 w - - 0 1)

Antonov, Yuri Mikhailovich

Erokhin, Vladimir Alekseevich

2nd Comm., Phenix, 1988

4K1R1/pp2pN2/4kb2/1p1pP2r/6q1/B5NB/5Q1n/3r2n1

#2

8 + 12

702 Phenix 1990

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe5
      • 2.Sd8#
    • 1...Bxe5
      • 2.Sd8#
    • 1...d4
      • 2.Qa2#
    • 1...a5
      • 2.Qb6#
    • 1...a6
      • 2.Qb6#
  • Tries
    • 1.Bxg4+?
      • 1...Rf5
        • 2.Bxf5#
        • 2.Qxf5#
      • 1...Sxg4!
    • 1.Qc5?
      • threat
        • 2.Qc8#
      • 1...Bxe5
        • 2.Qxe7#
      • 1...d4
        • 2.Sd8#
      • 1...Rc1!
    • 1.Qe2?
      • threat
        • 2.Sd8#
      • 1...Bxe5
        • 2.Rg6#
      • 1...d4
        • 2.Qa2#
      • 1...Sxe2!
  • Keys
    • 1.Qe3!
      • threat
        • 2.Sd8#
      • 1...Bxe5
        • 2.Rg6#
      • 1...d4
        • 2.Qb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 3
  • Sets
    • R(g);SBLOCK,XP(E)::S(F)
    • B(i);SBLOCK,XP(E)::S(F)
    • P(f);OGATEB::QAB(A)
    • P(j);N_GUARD::QAR(A)
  • Tries
    • Try
      • B(D);CHECK,XQ(d)
      • Refutation
        • S(c);XB(D)
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Vars
        • B(i);N_GUARD,XP(E)::QAR1(A),XP(l)
        • P(f);::S(F)
      • Refutation
        • R(a);
    • Try
      • Q(A);
      • Threat
        • S(F)
      • Vars
        • B(i);OGATEB,P_SPINB(i),XP(E)::R(H)
        • P(f);OGATEB::QAB(A)
      • Refutation
        • S(b);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • S(F)
    • Vars
      • B(i);OGATEB,P_SPINB(i),XP(E)::R(H)
      • P(f);OGATEB::QAB(A)
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