MESON Chess Problem Database

Problem Display
PID: 64984 (2R5/5Kp1/3pN2Q/R1nkPp2/3N3r/bP3PB1/8/1B1n4 w - - 0 1)

Dombrovskis, Alfreds A

Mochalkin, Oleksandr Viktorovich

1/2 Prize, Shakhmaty, 1988

2R5/5Kp1/3pN2Q/R1nkPp2/3N3r/bP3PB1/8/1B1n4

#2

11 + 8

5159 FIDE Album (1986-1988) (Annexe) 1996

SOLUTION

  • SOUND
  • Sets
    • 1...dxe5
      • 2.Rd8#
  • Tries
    • 1.Sxf5?
      • threat
        • 2.Se7#
      • 1...dxe5
        • 2.Sc7#
      • 1...Rf4!
    • 1.Sf4+?
      • 1...Kxe5
        • 2.Sc6#
        • 2.Qxg7#
      • 1...Rxf4
        • 2.Qxd6#
      • 1...Kxd4!
    • 1.Raxc5+?
      • 1...dxc5
        • 2.Rd8#
      • 1...Bxc5!
    • 1.Qd2?
      • threat
        • 2.Sc7#
      • 1...Rxd4
        • 2.Qxd4#
      • 1...dxe5
        • 2.Rd8#
      • 1...f4
        • 2.Sc6#
      • 1...Rf4!
    • 1.Qe3?
      • threat
        • 2.Sc7#
      • 1...Rxd4
        • 2.Qxd4#
      • 1...dxe5
        • 2.Rd8#
        • 2.Qxe5#
      • 1...Sxe3!
    • 1.Qf4?
      • threat
        • 2.Sc7#
      • 1...dxe5
        • 2.Rd8#
        • 2.Qxe5#
      • 1...Rxf4!
    • 1.Qxh4?
      • threat
        • 2.Sc7#
      • 1...dxe5
        • 2.Rd8#
        • 2.Qd8#
      • 1...f4!
  • Keys
    • 1.Sc6!
      • threat
        • 2.Se7#
      • 1...dxe5
        • 2.Sc7#
      • 1...Rf4
        • 2.Sxf4#
      • 1...f4
        • 2.Be4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(g);OGATEB,XP(G)::R(K)
  • Tries
    • Try
      • S(E);XP(f)
      • Threat
        • S(E)
      • Vars
        • P(g);XP(G)::S(H)
      • Refutation
        • R(c);P_PINS(E)
    • Try
      • S(H);CHECK
      • Vars
        • R(c);XS(H)::QAR1(I),XP(g)
      • Refutation
        • K(e);N_SPINS(d),P-FLIGHT,XS(E)
    • Try
      • R(F);CHECK,XS(d)
      • Vars
        • P(g);S_CUTB(b),XR(F)::R(K)
      • Refutation
        • B(b);XR(F)
    • Try
      • Q(I);
      • Threat
        • S(H)
      • Vars
        • R(c);OGATE,P_SPINR(c),XS(E)::QAR1(I),XR(c)
        • P(g);OGATEB,XP(G)::R(K)
        • P(f);S_CUTR(c)::QAR(I)+S(E)
      • Refutation
        • R(c);
    • Try
      • Q(I);
      • Threat
        • S(H)
      • Vars
        • R(c);OGATE,XS(E)::QAR1(I),XR(c)
      • Refutation
        • S(a);XQ(I)
    • Try
      • Q(I);
      • Threat
        • S(H)
      • Refutation
        • R(c);XQ(I)
    • Try
      • Q(I);XR(c)
      • Threat
        • S(H)
      • Refutation
        • P(f);
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • P(g);XP(G)::S(H)
      • R(c);N_GUARD::S(H),XR(c)
      • P(f);N_GUARD,S_CUTR(c)::B(A)
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