MESON Chess Problem Database

Problem Display
PID: 244757 (4r3/6P1/4NQK1/1p2p2p/2P3p1/1R1Bk1P1/2P1PN1r/3R3n w - - 0 1)

Dombrovskis, Alfreds A

Shakhmaty v SSSR, 1951

4r3/6P1/4NQK1/1p2p2p/2P3p1/1R1Bk1P1/2P1PN1r/3R3n

#2

12 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf2
      • 2.Qxe5#
    • 1...Sxf2
      • 2.Qg5#
    • 1...bxc4
      • 2.Bxc4#
    • 1...e4
      • 2.Qd4#
      • 2.Qf4#
    • 1...h4
      • 2.Sxg4#
  • Tries
    • 1.cxb5?
      • threat
        • 2.Bc4#
      • 1...Rxf2
        • 2.Qxe5#
      • 1...Sxf2
        • 2.Qg5#
      • 1...Rd8!
    • 1.c5?
      • threat
        • 2.Bc4#
        • 2.Bxb5#
      • 1...Rxf2
        • 2.Qxe5#
      • 1...Sxf2
        • 2.Qg5#
      • 1...b4
        • 2.Bc4#
        • 2.Bb5#
        • 2.Ba6#
      • 1...Rd8!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Be4#
      • 1...Kxd4
        • 2.Qb6#
      • 1...Rxf2
        • 2.Bf5#
      • 1...Sxf2
        • 2.Sf5#
      • 1...bxc4
        • 2.Bxc4#
      • 1...exd4
        • 2.Qf4#
      • 1...e4
        • 2.Bxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(b);SBLOCK,XS(D)::QAR2(J),XP(f)
    • S(a);SBLOCK,XS(D)::QAB(J)
    • P(e);OGATE,XP(H)::R(E)+B(F),XP(e)
    • P(g);N_GUARD::S(D),XP(d)
  • Tries
    • Try
      • P(H);XP(e)
      • Threat
        • R(E)+B(F)
      • Vars
        • R(b);SBLOCK,XS(D)::QAR2(J),XP(f)
        • S(a);SBLOCK,XS(D)::QAB(J)
      • Refutation
        • R(h);
    • Try
      • P(H);
      • Threat
        • DUALS(2)
      • Vars
        • R(b);SBLOCK,XS(D)::QAR2(J),XP(f)
        • S(a);SBLOCK,XS(D)::QAB(J)
      • Refutation
        • R(h);
  • Actual
    • S(I);
    • Threat
      • R(E)+B(F)
    • Vars
      • K(c);OGATEB,P_SPINP(f),S_FLIGHT,XS(I)::QAB(J)
      • R(b);SBLOCK,XS(D)::R(E)+B(F)
      • S(a);SBLOCK,XS(D)::S(I)
      • P(e);OGATE,XP(H)::R(E)+B(F),XP(e)
      • P(f);N_GUARD,XS(I)::QAB1(J)
      • P(f);::R(E)+B(F),XP(f)
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