MESON Chess Problem Database

Problem Display
PID: 156612 (1Nb1nB2/1p6/2p1kpK1/3p3N/Q4PP1/1Pp1Pr2/3R4/2b1R2B w - - 0 1)

Tkachenko, Sergiy Ivanovich

Comm., Best Problems, 2005-2006

1Nb1nB2/1p6/2p1kpK1/3p3N/Q4PP1/1Pp1Pr2/3R4/2b1R2B

#2

12 + 10

4901 Best Problems 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe3
      • 2.Rxe3#
    • 1...Rxf4
      • 2.exf4#
    • 1...Sd6
      • 2.Sg7#
    • 1...Sc7
      • 2.Sg7#
    • 1...Sg7
      • 2.Sxg7#
    • 1...d4
      • 2.Qc4#
    • 1...c5
      • 2.Qxe8#
    • 1...f5
      • 2.gxf5#
  • Tries
    • 1.Qxc6+?
      • 1...Sd6
        • 2.Sg7#
        • 2.Qxd5#
        • 2.Qxd6#
      • 1...bxc6!
    • 1.f5+?
      • 1...Ke5
        • 2.Qd4#
      • 1...Rxf5!
  • Keys
    • 1.Rxd5!
      • threat
        • 2.Qe4#
      • 1...Kxd5
        • 2.Qc4#
      • 1...Rxe3
        • 2.f5#
      • 1...Rxf4
        • 2.Sxf4#
      • 1...cxd5
        • 2.Qxe8#
      • 1...Sd6
        • 2.Rxd6#
      • 1...f5
        • 2.Re5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • R(c);OGATE,P_SPINR(c),XP(E)::R(A),XR(c)
    • R(c);OGATE,XP(G)::R(A)+P(E),XR(c)
    • S(j);N_GUARD::S(I)
    • S(j);N_GUARD::S(I),XS(j)
    • P(d);OGATEB::QAB(F)
    • P(e);OGATE::QAR2(F),XS(j)
    • P(g);OGATE::P(H),XP(g)
  • Tries
    • Try
      • Q(F);CHECK,XP(e)
      • Refutation
        • P(h);XQ(F)
    • Try
      • P(G);CHECK
      • Vars
        • K(f);P-FLIGHT::QAB1(F)
      • Refutation
        • R(c);XP(G)
  • Actual
    • R(C);XP(d)
    • Threat
      • QAR2(F)
    • Vars
      • K(f);OGATEB,P_SPINR(c),S_FLIGHT,XR(C)::QAB1(F)
      • R(c);N_GUARD,P_SPINR(c),XP(E)::P(G)
      • R(c);XP(G)::S(I),XR(c)
      • P(e);OGATE,SBLOCK,XR(C)::QAR2(F),XS(j)
      • S(j);N_GUARD::R1(C),XS(j)
      • P(g);N_GUARD::R1(C)
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