MESON Chess Problem Database

Problem Display
PID: 85153 (B3RB1K/nn4pb/1r6/1pNk2pp/1Q6/1P4Nq/8/8 w - - 0 1)

Makaronets, Leonid

Canadian Chess Chat, 1980

B3RB1K/nn4pb/1r6/1pNk2pp/1Q6/1P4Nq/8/8

#2

8 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rg6
      • 2.Qe4#
    • 1...Be4
      • 2.Qxe4#
    • 1...Bg8
      • 2.Qe4#
    • 1...g6
      • 2.Qe4#
  • Tries
    • 1.Sce4?
      • threat
        • 2.Qc5#
      • 1...Kc6
        • 2.Qd6#
      • 1...Rc6
        • 2.Qd2#
      • 1...Sc6
        • 2.Sc3#
      • 1...Qc8!
    • 1.Se6?
      • threat
        • 2.Qc5#
      • 1...Ke5
        • 2.Qd4#
      • 1...Kc6
        • 2.Qd6#
      • 1...Rc6
        • 2.Qd4#
      • 1...Sc6
        • 2.Sc7#
      • 1...Qxg3!
    • 1.Qd2+?
      • 1...Kc6
        • 2.Qd6#
      • 1...Bd3!
    • 1.Qd4+?
      • 1...Kc6
        • 2.Qd6#
      • 1...Kxd4!
  • Keys
    • 1.Sd7!
      • threat
        • 2.Qc5#
      • 1...Kc6
        • 2.Qd6#
      • 1...Rc6
        • 2.Re5#
      • 1...Sc6
        • 2.Sxb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • R(f);S_CUTB(j)::QAB1(C)
    • B(j);N_GUARD::QAB1(C),XB(j)
    • B(j);N_GUARD::QAB1(C)
    • P(i);S_CUTB(j)::QAB1(C)
  • Tries
    • Try
      • S(D);
      • Threat
        • QAR1(C)
      • Vars
        • K(c);S_FLIGHT::QAR1(C)
        • R(f);N_SPINS(h),SBLOCK::QAR(C)
        • S(g);N_SPINS(h),SBLOCK::S(D)
      • Refutation
        • Q(a);
    • Try
      • S(D);
      • Threat
        • QAR1(C)
      • Vars
        • K(c);N_SPINS(h),P-FLIGHT::QAB1(C)
        • K(c);S_FLIGHT::QAR1(C)
        • R(f);N_SPINS(h),SBLOCK::QAR1(C)
        • S(g);N_SPINS(h),SBLOCK::S(D)
      • Refutation
        • Q(a);XS(B)
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT::QAR1(C)
      • Refutation
        • B(j);P_SPINB(j)
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT::QAR1(C)
      • Refutation
        • K(c);N_SPINS(h),P-FLIGHT,XQ(C)
  • Actual
    • S(D);
    • Threat
      • QAR1(C)
    • Vars
      • K(c);S_FLIGHT::QAR1(C)
      • R(f);N_SPINS(h),SBLOCK::R1(F)
      • S(g);N_SPINS(h),SBLOCK::S(D),XR(f)
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