MESON Chess Problem Database

Problem Display
PID: 270570 (3r2b1/8/7Q/NNrknP1R/5P1K/2p2P2/3q4/3R3B w - - 0 1)

Billingham, LR

Sunday Referee, 1931

(First published on Sun Dec 6 1931)

3r2b1/8/7Q/NNrknP1R/5P1K/2p2P2/3q4/3R3B

#2

10 + 7

15239 Valois Notebooks 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Qd4
      • 2.Rxd4#
    • 1...Rd6
      • 2.Qxd6#
    • 1...Ra8
      • 2.Qd6#
    • 1...Rb8
      • 2.Qd6#
    • 1...Rc8
      • 2.Qd6#
    • 1...Re8
      • 2.Qd6#
    • 1...Rf8
      • 2.Qd6#
    • 1...Be6
      • 2.Qxe6#
    • 1...Bh7
      • 2.Qe6#
    • 1...Sxf3+
      • 2.Bxf3#
    • 1...Sg4
      • 2.fxg4#
    • 1...Sd7
      • 2.Qd6#
    • 1...Sf7
      • 2.Qe6#
  • Tries
    • 1.Rxd2+?
      • 1...Sd3
        • 2.Rxd3#
      • 1...cxd2!
  • Keys
    • 1.Qf6!
      • threat
        • 2.Qxe5#
      • 1...Sxf3+
        • 2.Bxf3#
      • 1...Sg6+
        • 2.fxg6#
      • 1...Re8
        • 2.Qd6#
      • 1...Sd3
        • 2.Qd4#
        • 2.Qxd8#
      • 1...Sc4
        • 2.Sxc3#
      • 1...Sg4
        • 2.Qxd8#
        • 2.fxg4#
      • 1...Sc6
        • 2.Sc7#
      • 1...Sd7
        • 2.Qd6#
      • 1...Sf7
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 9
  • Sets
    • Q(a);OGATE,P_PINP(D)::R1(A),XQ(a)
    • R(f);N_GUARD::QAR1(J),XR(f)
    • R(f);N_GUARD::QAR1(J)
    • B(g);N_GUARD::QAB1(J),XB(g)
    • B(g);N_GUARD::QAB1(J)
    • S(e);CHECK,OGATE,P_SPINS(e),XP(C)::B(B),XS(e)
    • S(e);OGATE::B(B)+P(C),XS(e)
    • S(e);S_CUTR(f)::QAR1(J)
    • S(e);S_CUTB(g)::QAB1(J)
  • Tries
    • Try
      • R(A);CHECK,XQ(a)
      • Vars
        • S(e);N_GUARD,P_SPINS(e)::R(A),XS(e)
      • Refutation
        • P(b);XR(A)
  • Actual
    • Q(J);
    • Threat
      • QAR1(J),XS(e)
    • Vars
      • S(e);CHECK,OGATE,P_SPINS(e),XP(C)::B(B),XS(e)
      • S(e);CHECK,OGATE::R(I)+P(H),XS(e)
      • R(f);N_GUARD::QAR1(J)
      • S(e);S_CUTR(c)::S(G),XP(b)
      • S(e);S_CUTR(c)::S(G)
      • S(e);S_CUTR(f)::QAR1(J)
      • S(e);S_CUTB(g)::QAB1(J)
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