MESON Chess Problem Database

Problem Display
PID: 27294 (5r1R/2pbB1p1/5q1b/8/3QNNnk/1RK4p/8/3B4 w - - 0 1)

Dombrovskis, Alfreds A

1st Place, Match: Latvia - Urals, 1948

5r1R/2pbB1p1/5q1b/8/3QNNnk/1RK4p/8/3B4

#2

8 + 9

2988 Izbrannie Kompozitsi 1985
5454 Near Snap 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qg5
      • 2.Bxg5#
    • 1...Sf2
      • 2.Sg6#
    • 1...Sh2
      • 2.Sg6#
    • 1...Se3
      • 2.Sg6#
    • 1...Se5
      • 2.Qf2#
  • Tries
    • 1.Kb2?
      • threat
        • 2.Rxh3#
      • 1...Sf2
        • 2.Sg6#
      • 1...Sh2
        • 2.Sg6#
      • 1...Se3
        • 2.Sg6#
      • 1...Se5
        • 2.Qf2#
      • 1...h2
        • 2.Rh3#
      • 1...Rb8!
    • 1.Rxh6+?
      • 1...Sxh6
        • 2.Sg6#
      • 1...gxh6!
  • Keys
    • 1.Kd2!
      • threat
        • 2.Rxh3#
      • 1...Sf2
        • 2.Qxf2#
      • 1...Sh2
        • 2.Qf2#
      • 1...Se3
        • 2.Sg6#
      • 1...Se5
        • 2.Qf2#
      • 1...h2
        • 2.Rh3#

This anticipates 168288(2005)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • Q(d);N_PINQ(D),OGATE::B(G),XQ(d)
    • S(b);::S(F)
    • S(b);N_PINQ(D)::QAB(D)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Threat
        • R1(B),XP(a)
      • Vars
        • S(b);::S(F)
        • S(b);N_PINQ(D)::QAB(D)
        • P(a);::R1(B)
      • Refutation
        • R(i);P_PINR(B)
    • Try
      • R(H);CHECK,XB(e)
      • Vars
        • S(b);XR(H)::S(F)
      • Refutation
        • P(h);XR(H)
  • Actual
    • K(C);N_SPINQ(D),P_SPINS(F),S_FLIGHT
    • Threat
      • R1(B),XP(a)
    • Vars
      • S(b);N_GUARD::QAB(D),XS(b)
      • S(b);N_GUARD::QAB(D)
      • S(b);N_PINS(F)::S(F)
      • P(a);::R1(B)
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