MESON Chess Problem Database

Problem Display
PID: 234467 (8/3R2Kb/Q1pP4/3nk1BR/4nN1N/2P5/8/8 w - - 0 1)

Makaronets, Leonid

Buletin Problemistic, 1975

8/3R2Kb/Q1pP4/3nk1BR/4nN1N/2P5/8/8

#2

9 + 5

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bf5
      • 2.Sf3#
  • Tries
    • 1.Bh6+?
      • 1...Bf5
        • 2.Sf3#
        • 2.Shg6#
        • 2.Rxf5#
      • 1...Sg5!
    • 1.Qd3?
      • threat
        • 2.Qd4#
      • 1...Sexc3
        • 2.Sf3#
      • 1...Sdxc3
        • 2.Re7#
      • 1...c5
        • 2.Qxd5#
      • 1...Sxf4!
  • Keys
    • 1.Qc4!
      • threat
        • 2.Qd4#
      • 1...Sexc3
        • 2.Bf6#
      • 1...Sdxc3
        • 2.Sd3#
      • 1...Sxf4
        • 2.Bf6#
      • 1...c5
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • B(e);SBLOCK::S(C)
  • Tries
    • Try
      • B(D);CHECK
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • Q(F);
      • Threat
        • QAB1(F)
      • Vars
        • S(a);XP(A)::S(C)
        • S(b);N_GUARD,XP(A)::R(H)
        • P(d);N_GUARD::QAR1(F),XS(b)
      • Refutation
        • S(b);XS(B)
  • Actual
    • Q(F);
    • Threat
      • QAB1(F)
    • Vars
      • S(a);XP(A)::R(E)+B(D),DCHECK
      • S(b);XP(A)::S(B)
      • S(b);SBLOCK,XS(B)::R(E)+B(D),DCHECK
      • P(d);N_GUARD::QAR1(F),XS(b)
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