MESON Chess Problem Database

Problem Display
PID: 64914 (6r1/4p3/2P1pp2/2K1kP1N/R2R4/2P2P2/1Q2n2b/1B4n1 w - - 0 1)

Antonov, Yuri Mikhailovich

Erokhin, Vladimir Alekseevich

2nd Prize, Odessa Festival, 1988

6r1/4p3/2P1pp2/2K1kP1N/R2R4/2P2P2/1Q2n2b/1B4n1

#2

10 + 8

5159 FIDE Album (1986-1988) (Annexe) 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Rg2
      • 2.Qb8#
    • 1...Rg3
      • 2.Qb8#
    • 1...Rg4
      • 2.Qb8#
    • 1...Rg5
      • 2.Qb8#
    • 1...Rg6
      • 2.Qb8#
    • 1...Rg7
      • 2.Qb8#
    • 1...Rb8
      • 2.Qxb8#
    • 1...Sxf3
      • 2.Qxe2#
    • 1...Sh3
      • 2.Qxe2#
    • 1...Sg3
      • 2.f4#
    • 1...Sxd4
      • 2.cxd4#
  • Tries
    • 1.Qa2?
      • threat
        • 2.Qxe6#
      • 1...Sxd4
        • 2.cxd4#
      • 1...exf5
        • 2.Qd5#
      • 1...Sf4!
    • 1.Qb3?
      • threat
        • 2.Qxe6#
      • 1...Sxd4
        • 2.cxd4#
      • 1...exf5
        • 2.Qd5#
      • 1...Sf4!
    • 1.c4?
      • threat
        • 2.Rd5#
      • 1...Sxd4
        • 2.Qxd4#
      • 1...exf5
        • 2.Re4#
      • 1...Sc3!
  • Keys
    • 1.Sg7!
      • threat
        • 2.Re4#
      • 1...Rxg7
        • 2.Qb8#
      • 1...Sxd4
        • 2.Qxh2#
      • 1...exf5
        • 2.Rd5#
      • 1...Sg3
        • 2.f4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 8
  • Sets
    • R(h);N_GUARD::QAB(B)
    • R(h);N_GUARD::QAB(B),XR(h)
    • S(a);N_GUARD,XP(D)::QAR(B),XS(b)
    • S(a);N_GUARD::QAR(B),XS(b)
    • S(b);N_GUARD,S_CUTB(c)::P(D)
    • S(b);OGATE,XR(F)::P(C),XS(b)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAR1(B),XP(e)
      • Vars
        • S(b);OGATE,XR(F)::P(C),XS(b)
        • P(e);N_GUARD,XP(H)::QAR1(B)
      • Refutation
        • S(b);
    • Try
      • Q(B);
      • Threat
        • QAR1(B),XP(e)
      • Vars
        • S(b);OGATE,XR(F)::P(C),XS(b)
        • P(e);N_GUARD,XP(H)::QAR1(B)
      • Refutation
        • S(b);
    • Try
      • P(C);
      • Threat
        • QAB(B)+R(F),DCHECK
      • Vars
        • S(b);OGATE,P_SPINS(b),XR(F)::QAB1(B),XS(b)
        • P(e);SBLOCK,XP(H)::QAB(B)+R(F),DCHECK
      • Refutation
        • S(b);
  • Actual
    • S(I);
    • Threat
      • R1(F)
    • Vars
      • R(h);N_GUARD,XS(I)::QAB(B)
      • S(b);OGATE,XR(F)::QAB(B),XB(c)
      • P(e);N_GUARD,XP(H)::R1(F)
      • S(b);N_GUARD,S_CUTB(c)::P(D)
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