MESON Chess Problem Database

Problem Display
PID: 249171 (b7/5Q2/8/2P1P2r/2p1k2P/rB2bNP1/4R1K1/4N3 w - - 0 1)

Makaronets, Leonid

3rd HM., Schakend Nederland, 1984

b7/5Q2/8/2P1P2r/2p1k2P/rB2bNP1/4R1K1/4N3

#2

10 + 6

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Bc2#
    • 1...Ra4
      • 2.Bc2#
    • 1...Ra5
      • 2.Bc2#
    • 1...Ra6
      • 2.Bc2#
    • 1...Ra7
      • 2.Bc2#
    • 1...Rf5
      • 2.Qxc4#
    • 1...Bd5
      • 2.Qf4#
    • 1...c3
      • 2.Bc2#
      • 2.Qf4#
  • Tries
    • 1.Sc2?
      • threat
        • 2.Rxe3#
      • 1...Kd3
        • 2.Rxe3#
        • 2.Qxc4#
      • 1...Rxb3!
    • 1.Bxc4?
      • threat
        • 2.Qf4#
      • 1...Rxh4
        • 2.Qg6#
      • 1...Rf5!
    • 1.g4?
      • threat
        • 2.Qxc4#
      • 1...cxb3
        • 2.Qc4#
      • 1...Ra4
        • 2.Bc2#
      • 1...c3
        • 2.Bc2#
        • 2.Qc4#
      • 1...Bd5!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Sf2#
      • 1...Kxd3
        • 2.Qxc4#
      • 1...cxd3
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • R(a);N_GUARD::B(D)
    • R(e);SBLOCK::QAR2(J),XP(c)
    • B(f);SBLOCK::QAR1(J)
  • Tries
    • Try
      • S(A);
      • Threat
        • R1(B),XB(b)
      • Refutation
        • R(a);XB(D)
    • Try
      • B(D);XP(c)
      • Threat
        • QAR1(J)
      • Vars
        • R(e);N_GUARD,XP(G)::QAB(J)
      • Refutation
        • R(e);
    • Try
      • P(F);
      • Threat
        • QAR2(J),XP(c)
      • Vars
        • P(c);XB(D)::QAR2(J)
        • R(a);N_GUARD::B(D)
      • Refutation
        • B(f);
  • Actual
    • S(A);
    • Threat
      • S(A)
    • Vars
      • K(d);N_SPINB(b),P_PINS(E),S_FLIGHT,XS(A)::QAB1(J),XP(c)
      • P(c);SBLOCK,XS(A)::QAR1(J)
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