MESON Chess Problem Database

Problem Display
PID: 225087 (2R1B3/8/2q1p1Q1/n2kP3/PP6/N2p4/PBpP4/4n2K w - - 0 1)

Luke, R

Sunday Chronicle, 1945

(First published on Sun Feb 18 1945)

2R1B3/8/2q1p1Q1/n2kP3/PP6/N2p4/PBpP4/4n2K

#2

11 + 7

15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qxa4
      • 2.Rc5#
    • 1...Qb7
      • 2.Rc5#
    • 1...Qd7
      • 2.Rc5#
    • 1...Qa8
      • 2.Rc5#
    • 1...Qxe8
      • 2.Rc5#
    • 1...Qc4
      • 2.Rd8#
    • 1...Qc5
      • 2.Rxc5#
    • 1...Qa6
      • 2.Rc5#
    • 1...Sg2
      • 2.Qxd3#
      • 2.Qxg2#
    • 1...Sb3
      • 2.Bxc6#
    • 1...Sc4
      • 2.Bxc6#
    • 1...Sb7
      • 2.Bxc6#
  • Tries
    • 1.Rd8+?
      • 1...Qd6
        • 2.Rxd6#
      • 1...Qd7!
    • 1.Qg2+?
      • 1...Sf3
        • 2.Qxf3#
      • 1...Sxg2!
  • Keys
    • 1.Sc4!
      • threat
        • 2.Se3#
      • 1...Kxc4+
        • 2.Qe4#
      • 1...Qxc4
        • 2.Rd8#
      • 1...Sxc4
        • 2.Bxc6#
      • 1...Qc5
        • 2.Rxc5#
      • 1...Qb6
        • 2.Sxb6#
      • 1...Sg2
        • 2.Qxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • Q(f);OGATE,XP(F)::R1(J)
    • Q(f);OGATE::R1(J)
    • Q(f);OGATE,XB(K)::R1(J)
    • Q(f);N_GUARD::R(J)
    • Q(f);OGATE::R1(J),XQ(f)
    • S(d);N_GUARD::B(K),XQ(f)
  • Tries
    • Try
      • R(J);CHECK
      • Vars
        • Q(f);N_GUARD,P_SPINQ(f)::R1(J),XQ(f)
      • Refutation
        • Q(f);P_SPINQ(f)
    • Try
      • Q(I);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB(I),XS(a)
      • Refutation
        • S(a);XQ(I)
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • K(e);CHECK,P_SPINQ(f),S_FLIGHT,XS(E)::QAR2(I)
      • Q(f);N_GUARD,SBLOCK,XS(E)::R(J)
      • S(d);N_GUARD,SBLOCK,XS(E)::B(K),XQ(f)
      • Q(f);OGATE::R1(J),XQ(f)
      • Q(f);N_GUARD::S(E),XQ(f)
      • S(a);N_GUARD::QAR2(I),XP(c)
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