MESON Chess Problem Database

Problem Display
PID: 191923 (8/pK2p3/RB2p3/R1NPp3/1p1k4/NP2p3/q1B4Q/bb6 w - - 0 1)

Makaronets, Leonid

Schweizerische Schachzeitung, 1983

8/pK2p3/RB2p3/R1NPp3/1p1k4/NP2p3/q1B4Q/bb6

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Kc3
      • 2.Sa4#
    • 1...Kxd5
      • 2.Se4#
    • 1...Bc3
      • 2.Sxe6#
    • 1...exd5
      • 2.Sb5#
  • Tries
    • 1.Sc4?
      • threat
        • 2.Qxe5#
      • 1...Kc3
        • 2.Se4#
      • 1...Kxd5
        • 2.Sa4#
      • 1...e4
        • 2.Qe5#
      • 1...Qxb3!
    • 1.Sd3+?
      • 1...Kc3
        • 2.Sb5#
      • 1...axb6
        • 2.Qxe5#
      • 1...Ke4!
    • 1.Sd7+?
      • 1...axb6
        • 2.Qxe5#
      • 1...Kc3!
  • Keys
    • 1.Bc7!
      • threat
        • 2.Qxe5#
      • 1...Kc3
        • 2.Bxe5#
      • 1...Kxd5
        • 2.Sxe6#
      • 1...e4
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • K(f);S_FLIGHT::S(F)
    • K(f);P-FLIGHT,XP(G)::R(E)+S(F)
    • B(a);SBLOCK::B(I)+S(F),DCHECK,XP(h)
    • P(h);SBLOCK,XP(G)::S(C)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAB1(B),XP(g)
      • Vars
        • K(f);S_FLIGHT::S(F)
        • K(f);P-FLIGHT,XP(G)::R(E)+S(F)
        • P(g);::QAB1(B)
      • Refutation
        • Q(c);XP(D)
    • Try
      • S(F);CHECK
      • Vars
        • K(f);S_FLIGHT::S(C)
        • P(i);XB(I)::QAB1(B),XP(g)
      • Refutation
        • K(f);P-FLIGHT
    • Try
      • S(F);CHECK
      • Vars
        • P(i);XB(I)::QAB1(B),XP(g)
      • Refutation
        • K(f);S_FLIGHT
  • Actual
    • B(I);
    • Threat
      • QAB1(B),XP(g)
    • Vars
      • K(f);S_FLIGHT::B(I),XP(g)
      • K(f);P-FLIGHT,XP(G)::R(E)+S(F),XP(h)
      • P(g);::QAB1(B)
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