MESON Chess Problem Database

Problem Display
PID: 226697 (Q6B/2b1p2B/1rr1N2K/1pP2P2/2P1k3/p1n1p3/4P3/1b2nR2 w - - 0 1)

Thomson, Robert Gavin

Sunday Chronicle, 1945

(First published on Sun Dec 30 1945)

Q6B/2b1p2B/1rr1N2K/1pP2P2/2P1k3/p1n1p3/4P3/1b2nR2

#2

10 + 11

15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bf4+
      • 2.Rxf4#
    • 1...Be5
      • 2.f6#
    • 1...Bd6
      • 2.Sg5#
    • 1...Bd8
      • 2.Rf4#
  • Tries
    • 1.Bxc3?
      • threat
        • 2.f6#
      • 1...Bf4+
        • 2.Rxf4#
      • 1...bxc4!
    • 1.Bd4?
      • threat
        • 2.f6#
      • 1...Bf4+
        • 2.Rxf4#
      • 1...bxc4!
    • 1.Qxc6+?
      • 1...Sd5
        • 2.Sg5#
        • 2.Qxd5#
      • 1...Rxc6!
  • Keys
    • 1.Qd8!
      • threat
        • 2.Qd4#
      • 1...Rxe6+
        • 2.fxe6#
      • 1...Bf4+
        • 2.Rxf4#
      • 1...Bxd8
        • 2.Rf4#
      • 1...Sxe2
        • 2.Qd5#
      • 1...Rd6
        • 2.Rf4#
      • 1...Be5
        • 2.f6#
      • 1...Bd6
        • 2.Sg5#
      • 1...Sc2
        • 2.Qd3#
      • 1...Sf3
        • 2.exf3#
      • 1...Sd5
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • B(j);CHECK,N_GUARD::R1(A),XB(j)
    • B(j);SBLOCK::B(H)+P(E)
    • B(j);N_PINS(F)::S(F)
    • B(j);N_GUARD::R1(A)
  • Tries
    • Try
      • B(J);XS(d)
      • Threat
        • B(H)+P(E)
      • Vars
        • B(j);CHECK,N_GUARD::R1(A),XB(j)
      • Refutation
        • P(g);XP(C)
    • Try
      • B(J);
      • Threat
        • B(H)+P(E)
      • Vars
        • B(j);CHECK,N_GUARD::R1(A),XB(j)
      • Refutation
        • P(g);XP(C)
    • Try
      • Q(I);CHECK,N_SPINS(F),XR(i)
      • Refutation
        • R(h);P_PINS(F),XQ(I)
  • Actual
    • Q(I);N_PINR(i)
    • Threat
      • QAR1(I)
    • Vars
      • R(i);CHECK,OGATE,XS(F)::B(H)+P(E),XR(i)
      • B(j);CHECK,N_GUARD::R1(A),XB(j)
      • B(j);N_GUARD,XQ(I)::R1(A)
      • S(d);N_GUARD,XP(B)::QAB1(I)
      • R(i);S_CUTB(j)::R1(A)
      • B(j);SBLOCK::B(H)+P(E)
      • B(j);N_PINS(F)::S(F)
      • S(b);N_GUARD,S_CUTB(a)::QAB1(I)
      • S(b);OGATE::P(B),XS(b)
      • S(d);N_GUARD::QAB1(I),XS(d)
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