MESON Chess Problem Database

Problem Display
PID: 260710 (8/2pp1B2/1pP2p2/1P1KpP2/pB1b4/5R2/kPQ2n2/rn6 w - - 0 1)

Lipton, Michael

3rd Prize, McWilliam Ty., 1955

8/2pp1B2/1pP2p2/1P1KpP2/pB1b4/5R2/kPQ2n2/rn6

#2

9 + 11

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Bxb2
      • 2.Qc4#
    • 1...Bc3
      • 2.bxc3#
    • 1...Be3
      • 2.b3#
    • 1...Bc5
      • 2.b3#
    • 1...Sd2
      • 2.Ra3#
    • 1...Sa3
      • 2.Rxa3#
    • 1...Sc3+
      • 2.bxc3#
    • 1...a3
      • 2.Qb3#
    • 1...dxc6+
      • 2.Kxc6#
  • Tries
    • 1.cxd7?
      • threat
        • 2.Kc6#
      • 1...Sc3+
        • 2.bxc3#
      • 1...c6+
        • 2.Kxc6#
        • 2.Kd6#
      • 1...Sd2
        • 2.Ra3#
      • 1...Sa3
        • 2.Rxa3#
      • 1...c5!
  • Keys
    • 1.Bd6!
      • 1...Sc3+
        • 2.bxc3#
      • 1...dxc6+
        • 2.Kxc6#
      • 1...Bxb2
        • 2.Qc4#
      • 1...cxd6
        • 2.Kxd6#
      • 1...Bc3
        • 2.bxc3#
      • 1...Be3
        • 2.b3#
      • 1...Bc5
        • 2.b4#
      • 1...Sd2
        • 2.Ra3#
      • 1...Sa3
        • 2.Rxa3#
      • 1...Sd1
        • 2.Ke4#
      • 1...Sh1
        • 2.Ke4#
      • 1...Sd3
        • 2.Ke4#
      • 1...Sh3
        • 2.Ke4#
      • 1...Se4
        • 2.Kxe4#
      • 1...Sg4
        • 2.Ke4#
      • 1...a3
        • 2.Qb3#
      • 1...e4
        • 2.Kxd4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • B(f);P_SPINB(f),SBLOCK,XP(A)::QAB(B)
    • B(f);OGATE::QAR(B)+P(A),XB(f)
    • B(f);N_GUARD::QAR(B)+P(A)
    • S(b);N_GUARD::R1(C)
    • S(b);N_GUARD::R1(C),XS(b)
    • S(b);CHECK,OGATE::QAR(B)+P(A),XS(b)
    • P(e);N_GUARD::QAB1(B)
    • P(k);CHECK,XP(H)::B(I)+K(F),XP(k)
  • Tries
    • Try
      • P(H);XP(k)
      • Threat
        • B(I)+K(F)
      • Vars
        • S(b);CHECK,OGATE::QAR(B)+P(A),XS(b)
        • S(b);N_GUARD::R1(C)
        • S(b);N_GUARD::R1(C),XS(b)
      • Refutation
        • P(j);
  • Actual
    • B(D);
    • Vars
      • S(b);CHECK,OGATE::QAR(B)+P(A),XS(b)
      • P(k);CHECK,XP(H)::B(I)+K(F),XP(k)
      • B(f);P_SPINB(f),SBLOCK,XP(A)::QAB(B)
      • P(j);XB(D)::B(I)+K(F),XP(j)
      • B(f);OGATE::QAR(B)+P(A),XB(f)
      • B(f);N_GUARD::QAR(B)+P(A)
      • S(b);N_GUARD::R1(C)
      • S(b);N_GUARD::R1(C),XS(b)
      • S(d);::B(I)+K(F)
      • S(d);SBLOCK::B(I)+K(F)
      • S(d);::B(I)+K(F),XS(d)
      • P(e);N_GUARD::QAB1(B)
      • P(g);::B(I)+K(F),XB(f)
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