MESON Chess Problem Database

Problem Display
PID: 23898 (2Kn4/P3p3/4Rp2/1NPkppn1/2p5/2Q2NP1/4p1RP/2b3BB w - - 0 1)

Kopaev, Viacheslav Georgievich

4th Prize, diagrammes, 1996

2Kn4/P3p3/4Rp2/1NPkppn1/2p5/2Q2NP1/4p1RP/2b3BB

#2

12 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe6
      • 2.Qxc4#
    • 1...Se4
      • 2.Sc7#
    • 1...Sxe6
      • 2.a8Q#
      • 2.a8B#
    • 1...e4
      • 2.Sc7#
  • Tries
    • 1.Rxe2?
      • threat
        • 2.Sc7#
      • 1...Kxe6
        • 2.Qxc4#
      • 1...Sgxe6
        • 2.Sxe5#
      • 1...Sdxe6
        • 2.a8Q#
        • 2.a8B#
      • 1...Be3!
    • 1.Rxe5+?
      • 1...Kc6
        • 2.Sfd4#
        • 2.Sbd4#
      • 1...fxe5!
    • 1.Qd4+?
      • 1...Kxe6
        • 2.Qxc4#
      • 1...exd4!
    • 1.Qd3+?
      • 1...Kxe6
        • 2.Qxc4#
      • 1...cxd3!
    • 1.a8Q+?
      • 1...Kxe6
        • 2.Qxc4#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sb7!
  • Keys
    • 1.Sxe5!
      • threat
        • 2.Qxc4#
      • 1...Ke4
        • 2.Rxe2#
        • 2.Qd4#
        • 2.Qxc4#
      • 1...Kxe6
        • 2.Sc7#
      • 1...Sgxe6
        • 2.Rxe2#
      • 1...Sdxe6
        • 2.a8Q#
        • 2.a8B#
      • 1...fxe5
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • K(d);S_FLIGHT,XR(J)::QAB(E),XP(c)
    • S(g);SBLOCK::S(H)
    • S(j);N_GUARD,SBLOCK,XR(J)::P=Q
    • P(e);::S(H)
  • Tries
    • Try
      • R(C);XP(b)
      • Threat
        • S(H)
      • Vars
        • K(d);P_SPINP(e),S_FLIGHT,XR(J)::QAB(E),XP(c)
        • S(g);N_GUARD,SBLOCK,XR(J)::B(B)+S(F),XP(e)
        • S(j);N_GUARD,SBLOCK,XR(J)::P=Q
      • Refutation
        • B(a);
    • Try
      • R(J);CHECK,XP(e)
      • Refutation
        • P(h);XR(J)
    • Try
      • Q(E);CHECK
      • Vars
        • K(d);S_FLIGHT,XR(J)::QAB(E),XP(c)
      • Refutation
        • P(e);XQ(E)
    • Try
      • Q(E);CHECK
      • Vars
        • K(d);S_FLIGHT,XR(J)::QAB(E),XP(c)
      • Refutation
        • P(c);XQ(E)
    • Try
      • P(K);CHECK
      • Vars
        • K(d);S_FLIGHT,XR(J)::QAB(E),XP(c)
        • S(j);N_GUARD,P_SPINS(j)::QAB1(K),XS(j)
      • Refutation
        • S(j);P_SPINS(j)
  • Actual
    • S(F);XP(e)
    • Threat
      • QAB1(E),XP(c)
    • Vars
      • K(d);S_FLIGHT,XR(J)::S(H)
      • S(g);N_GUARD,SBLOCK,XR(J)::B(B)+R(C),XP(b)
      • S(j);N_GUARD,SBLOCK,XR(J)::P=Q
      • P(h);OGATE,XS(F)::QAR1(E),XP(h)
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