MESON Chess Problem Database

Problem Display
PID: 260088 (4Q3/6R1/8/6K1/4NP2/5kP1/2b2p2/3N1B1n w - - 0 1)

Kopyl, Valery Volodimirovich

1st Prize, Problemist Ukraini, 2009

4Q3/6R1/8/6K1/4NP2/5kP1/2b2p2/3N1B1n

#2

8 + 4

17267 FIDE Album (2007-2009) 2015
6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Sxg3
      • 2.Sd2#
  • Tries
    • 1.Kh4?
      • threat
        • 2.Sd2#
        • 2.Sg5#
      • 1...Bxe4
        • 2.Qh5#
      • 1...Sxg3!
    • 1.Kf6?
      • threat
        • 2.Sd2#
      • 1...Bxe4
        • 2.Qh5#
      • 1...Sxg3!
    • 1.Kh6?
      • threat
        • 2.Sd2#
      • 1...Bxe4
        • 2.Qh5#
      • 1...Sxg3!
    • 1.Qd7?
      • 1...Kxe4
        • 2.Bg2#
      • 1...Bxd1
        • 2.Qd3#
      • 1...Bxe4
        • 2.Qg4#
      • 1...Sxg3
        • 2.Sd2#
      • 1...Bb3
        • 2.Qd3#
      • 1...Bd3
        • 2.Qxd3#
      • 1...Ba4
        • 2.Qd3#
      • 1...Bb1!
  • Keys
    • 1.Kf5!
      • threat
        • 2.Qh5#
      • 1...Bxe4+
        • 2.Qxe4#
      • 1...Sxg3+
        • 2.Rxg3#
      • 1...Bxd1
        • 2.Sd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(a);SBLOCK,XP(C)::S(D)
  • Tries
    • Try
      • K(F);S_FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • B(b);SBLOCK,XS(D)::QAB(H)
      • Refutation
        • S(a);XP(C)
    • Try
      • K(F);S_FLIGHT
      • Threat
        • S(D)
      • Vars
        • B(b);SBLOCK,XS(D)::QAB(H)
      • Refutation
        • S(a);XP(C)
    • Try
      • K(F);S_FLIGHT
      • Threat
        • S(D)
      • Vars
        • B(b);SBLOCK,XS(D)::QAB(H)
      • Refutation
        • S(a);XP(C)
    • Try
      • Q(H);
      • Vars
        • K(d);N_GUARD,S_FLIGHT,XS(D)::B(B)
        • B(b);N_GUARD,XS(A)::QAR2(H)
        • B(b);SBLOCK,XS(D)::QAB1(H)
        • S(a);SBLOCK,XP(C)::S(D)
        • B(b);N_GUARD::QAR2(H)
        • B(b);N_GUARD::QAR2(H),XB(b)
      • Refutation
        • B(b);
  • Actual
    • K(F);P-FLIGHT,P_SPINS(D)
    • Threat
      • QAB(H)
    • Vars
      • B(b);CHECK,OGATE,XS(D)::QAB1(H),XB(b)
      • S(a);CHECK,OGATE,XP(C)::R1(G),XS(a)
      • B(b);N_PINS(D),XS(A)::S(D)
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