MESON Chess Problem Database

Problem Display
PID: 245858 (3r4/1p2Qpqb/8/2P4R/3kn2B/1K1NR1p1/1P1p3r/3N4 w - - 0 1)

Dimitrov, Nikolai

Shakhmatna misl, 1950

3r4/1p2Qpqb/8/2P4R/3kn2B/1K1NR1p1/1P1p3r/3N4

#2

9 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5
      • 2.Qxe5#
    • 1...Qh6
      • 2.Qe5#
    • 1...Qf8
      • 2.Qe5#
    • 1...Qg4
      • 2.Qe5#
    • 1...Qg6
      • 2.Qe5#
    • 1...Qg8
      • 2.Qe5#
    • 1...Bg8
      • 2.Qxe4#
    • 1...Sf2
      • 2.Qxd8#
    • 1...Sc3
      • 2.bxc3#
    • 1...Sxc5+
      • 2.Qxc5#
    • 1...Sg5
      • 2.Qxd8#
    • 1...Sf6
      • 2.Qe5#
  • Tries
    • 1.Sb4?
      • threat
        • 2.Sc2#
        • 2.Rd3#
      • 1...Sxc5+
        • 2.Qxc5#
      • 1...Qe5
        • 2.Rd3#
        • 2.Qxe5#
      • 1...Qg5
        • 2.Rd3#
      • 1...Bf5
        • 2.Rd3#
      • 1...Sf2
        • 2.Qxd8#
      • 1...Sc3
        • 2.bxc3#
      • 1...Sd6
        • 2.Rd5#
      • 1...Sf6
        • 2.Qe5#
      • 1...f5
        • 2.Rd3#
      • 1...Sg5!
    • 1.Sf4?
      • threat
        • 2.Rd3#
      • 1...Sxc5+
        • 2.Qxc5#
      • 1...Sf2
        • 2.Se2#
        • 2.Qxd8#
      • 1...Sc3
        • 2.bxc3#
      • 1...Sd6
        • 2.Rd5#
      • 1...Sf6
        • 2.Qe5#
      • 1...Sg5!
    • 1.Bf6+?
      • 1...Sxf6
        • 2.Qe5#
      • 1...Qxf6!
  • Keys
    • 1.Qxd8+!
      • 1...Sd6
        • 2.Qxd6#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 12
  • Sets
    • Q(h);N_GUARD::QAB1(I),XQ(h)
    • Q(h);N_GUARD::QAB1(I)
    • B(i);N_GUARD::QAR1(I),XS(e)
    • S(e);N_GUARD::QAR(I),XR(j)
    • S(e);OGATE::P(B),XS(e)
    • S(e);CHECK,OGATE,XP(G)::QAB1(I),XS(e)
    • S(e);S_CUTQ(h)::QAB1(I)
  • Tries
    • Try
      • S(D);
      • Threat
        • DUALS(2)
      • Vars
        • S(e);CHECK,OGATE,XP(G)::QAB1(I),XS(e)
        • Q(h);::R1(E)
        • B(i);::R1(E)
        • S(e);N_GUARD::QAR(I),XR(j)
        • S(e);OGATE::P(B),XS(e)
        • S(e);S_CUTR(j)::R1(H)
        • S(e);S_CUTQ(h)::QAB1(I)
        • P(g);::R1(E)
      • Refutation
        • S(e);
    • Try
      • S(D);
      • Threat
        • R1(E)
      • Vars
        • S(e);CHECK,OGATE,XP(G)::QAB1(I),XS(e)
        • S(e);OGATE::P(B),XS(e)
        • S(e);S_CUTR(j)::R1(H)
        • S(e);S_CUTQ(h)::QAB1(I)
      • Refutation
        • S(e);
    • Try
      • B(F);CHECK
      • Vars
        • S(e);XB(F)::QAB1(I)
      • Refutation
        • Q(h);XB(F)
  • Actual
    • Q(I);CHECK,XR(j)
    • Vars
      • S(e);N_GUARD,P_SPINS(e)::QAR2(I),XS(e)
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