MESON Chess Problem Database

Problem Display
PID: 245943 (3B4/n5b1/6Pr/1pPP2Qp/1N1kP1p1/PPRp2P1/1K1NB3/1b6 w - - 0 1)

Kopyl, Valery Volodimirovich

Problemist Ukraini, 2013

3B4/n5b1/6Pr/1pPP2Qp/1N1kP1p1/PPRp2P1/1K1NB3/1b6

#2

14 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bf6
      • 2.Bxf6#
    • 1...Bf8
      • 2.Bf6#
    • 1...Sc6
      • 2.Sxc6#
    • 1...Sc8
      • 2.Sc6#
  • Tries
    • 1.Sf3+?
      • 1...Kxe4
        • 2.Qf4#
      • 1...gxf3!
    • 1.Bb6?
      • threat
        • 2.c6#
      • 1...Sc6
        • 2.Sxc6#
      • 1...Sc8
        • 2.Sc6#
      • 1...Bf8!
    • 1.Qf4?
      • threat
        • 2.e5#
      • 1...Be5
        • 2.Qf2#
      • 1...dxe2!
    • 1.e5?
      • threat
        • 2.Qf4#
      • 1...dxe2
        • 2.Qe3#
      • 1...Bxe5!
    • 1.c6?
      • threat
        • 2.Bb6#
      • 1...Bf8
        • 2.Bf6#
      • 1...Sc8!
  • Keys
    • 1.Sc4!
      • threat
        • 2.Qe3#
      • 1...Kxe4
        • 2.Qf4#
      • 1...Kxc5
        • 2.Bb6#
      • 1...bxc4
        • 2.Rxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • B(i);N_GUARD::B(N),XB(i)
    • B(i);N_GUARD::B(N)
    • S(h);N_GUARD::S(H),XS(h)
    • S(h);N_GUARD::S(H)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(c);P-FLIGHT,P_PINR(F),XP(I)::QAR1(L)
      • Refutation
        • P(d);XS(B)
    • Try
      • B(N);
      • Threat
        • B(N)+P(J)
      • Vars
        • S(h);N_GUARD::S(H),XS(h)
        • S(h);N_GUARD::S(H)
      • Refutation
        • B(i);
    • Try
      • Q(L);
      • Threat
        • QAR(L)+P(I)
      • Vars
        • B(i);SBLOCK::QAB(L)
      • Refutation
        • P(b);XB(C)
    • Try
      • P(I);
      • Threat
        • QAR2(L)
      • Vars
        • P(b);XB(C)::QAB1(L)
      • Refutation
        • B(i);XP(I)
    • Try
      • P(J);
      • Threat
        • B(N)
      • Vars
        • B(i);N_GUARD::B(N)
      • Refutation
        • S(h);
  • Actual
    • S(B);
    • Threat
      • QAB1(L)
    • Vars
      • K(c);OGATEB,P-FLIGHT,P_PINR(F),XP(I)::QAR1(L)
      • K(c);OGATEB,P_PINR(F),S_FLIGHT,XP(J)::B(N)
      • P(e);OGATE,XS(B)::R1(F),XP(e)
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