MESON Chess Problem Database

Problem Display
PID: 12480 (6bK/2N3R1/p4Q2/2p2B2/2kP3P/Pp6/1br5/BrnN4 w - - 0 1)

Lender, Baruch

3rd HM., UV CSTV, 1979

6bK/2N3R1/p4Q2/2p2B2/2kP3P/Pp6/1br5/BrnN4

#2

10 + 9

721 Variantim 1990
3335 Cyclone 2000
133 The Problemist Supplement 2011
56 The Problemist 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Bc3
      • 2.Se3#
    • 1...Bxd4
      • 2.Qxa6#
    • 1...cxd4
      • 2.Qc6#
  • Tries
    • 1.Qe6+?
      • 1...Kxd4
        • 2.Rg4#
        • 2.Rd7#
        • 2.Qe4#
      • 1...Bxe6!
    • 1.d5?
      • threat
        • 2.Se3#
      • 1...Bxa3
        • 2.Rg4#
      • 1...Rc3
        • 2.Rg4#
      • 1...Bd4
        • 2.Qxa6#
      • 1...Re2!
  • Keys
    • 1.Rg4!
      • threat
        • 2.Qxa6#
      • 1...Bxa3
        • 2.d5#
      • 1...Bxd4
        • 2.Se3#
      • 1...cxd4
        • 2.Qc6#
      • 1...Be6
        • 2.Qxe6#
      • 1...a5
        • 2.Qa6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • B(c);::S(B)
    • B(c);XP(D)::QAB(G),XP(h)
    • P(g);OGATEB,SBLOCK,XP(D)::QAR2(G)
  • Tries
    • Try
      • Q(G);CHECK
      • Refutation
        • B(i);XQ(G)
    • Try
      • P(D);
      • Threat
        • S(B)
      • Vars
        • B(c);N_GUARD,XP(C)::R(I)
        • R(d);S_CUTB(c)::R(I)
        • B(c);::QAB(G),XP(h)
      • Refutation
        • R(d);
  • Actual
    • R(I);
    • Threat
      • QAB(G),XP(h)
    • Vars
      • B(c);N_GUARD,XP(C)::R(I)+P(D)
      • B(c);P_PINQ(G),P_SPINB(c),XP(D)::S(B)
      • P(g);OGATEB,P_SPINP(g),XP(D)::QAR2(G)
      • B(i);N_GUARD::QAB(G),XB(i)
      • P(h);::QAB(G)
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