MESON Chess Problem Database

Problem Display
PID: 81411 (b1R1B3/2nQ1P2/q2P1p2/1P1kNp2/1p4N1/2RPP3/2r1pB1K/8 w - - 0 1)

Sukhodolov, Nikolai

2nd Prize, Zadachi i Etyudi, 2004

b1R1B3/2nQ1P2/q2P1p2/1P1kNp2/1p4N1/2RPP3/2r1pB1K/8

#2

13 + 9

23 Die Schwalbe 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Qb7
      • 2.dxc7#
    • 1...Qa1
      • 2.dxc7#
    • 1...Qa2
      • 2.dxc7#
    • 1...Qa3
      • 2.dxc7#
    • 1...Qa4
      • 2.dxc7#
    • 1...Qa5
      • 2.dxc7#
    • 1...Qa7
      • 2.dxc7#
    • 1...Sxb5
      • 2.R8c5#
    • 1...Sxe8
      • 2.R8c5#
    • 1...f4
      • 2.e4#
    • 1...fxe5
      • 2.Sf6#
  • Tries
    • 1.Rc5+?
      • 1...Kxc5
        • 2.e4#
      • 1...Rxc5!
    • 1.Qxf5?
      • threat
        • 2.Sc4#
      • 1...Kxd6
        • 2.Qd7#
      • 1...Qxd6
        • 2.e4#
      • 1...fxe5
        • 2.Qxe5#
      • 1...Qxc8!
  • Keys
    • 1.Sc4!
      • threat
        • 2.Qxf5#
      • 1...Qxd6+
        • 2.Qxd6#
      • 1...Kc5
        • 2.e4#
      • 1...Qxc8
        • 2.Sb6#
      • 1...fxg4
        • 2.Qf5#
        • 2.e4#
      • 1...Se6
        • 2.Sxf6#
      • 1...f4
        • 2.Qf5#
        • 2.e4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 11
  • Sets
    • Q(f);N_GUARD::QAR(J)+P(I),XS(h)
    • S(h);OGATE,XP(G)::R1(L)
    • S(h);OGATE,XB(M)::R1(L)
    • P(e);N_GUARD::P(E)
    • P(g);SBLOCK,XS(H)::S(F)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • K(d);P-FLIGHT,P_SPINS(h),XR(C)::B(A)+P(E)
      • Refutation
        • R(a);XR(C)
    • Try
      • Q(J);XP(e)
      • Threat
        • QAR(J)+S(H)
      • Vars
        • K(d);OGATEB,P-FLIGHT,XP(I)::QAR1(J)
        • Q(f);P_PINS(H),SBLOCK,XP(I)::P(E)
        • P(g);OGATE,P_SPINP(g),XS(H)::QAR1(J),XP(g)
      • Refutation
        • Q(f);XR(L)
  • Actual
    • S(H);
    • Threat
      • QAR2(J),XP(e)
    • Vars
      • Q(f);CHECK,OGATE,P_SPINQ(f),XP(I)::QAR1(J),XQ(f)
      • K(d);P-FLIGHT,P_SPINS(h)::B(A)+P(E)
      • Q(f);N_GUARD,XR(L)::S(H)
      • S(h);::S(F),XP(g)
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