MESON Chess Problem Database

Problem Display
PID: 150686 (3Q4/4pb2/1K1p2B1/2R1P3/1p1k2r1/3rNR2/2p2P2/3q4 w - - 0 1)

Thomson, Robert Gavin

The Referee, 1926

(First published on Sun Feb 21 1926)

3Q4/4pb2/1K1p2B1/2R1P3/1p1k2r1/3rNR2/2p2P2/3q4

#2

8 + 9

15239 Valois Notebooks 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf3
      • 2.Sxc2#
    • 1...Qa1
      • 2.Sxc2#
    • 1...Qe1
      • 2.Sxc2#
    • 1...Qf1
      • 2.Sxc2#
    • 1...Qg1
      • 2.Sxc2#
    • 1...Qh1
      • 2.Sxc2#
    • 1...Rxe3
      • 2.fxe3#
    • 1...Rg1
      • 2.Rf4#
    • 1...Rg2
      • 2.Rf4#
    • 1...Rg3
      • 2.Rf4#
    • 1...Re4
      • 2.Sf5#
    • 1...Rf4
      • 2.Rxf4#
    • 1...Rg5
      • 2.Rf4#
    • 1...Rxg6
      • 2.Rf4#
    • 1...e6
      • 2.Qxd6#
  • Tries
    • 1.Qxd6+?
      • 1...Bd5
        • 2.Rc4#
        • 2.Qxd5#
      • 1...exd6!
  • Keys
    • 1.Qh8!
      • threat
        • 2.e6#
      • 1...Qxf3
        • 2.Sxc2#
      • 1...Rxe3
        • 2.fxe3#
      • 1...Rxg6
        • 2.Rf4#
      • 1...Bxg6
        • 2.Rc4#
      • 1...dxe5
        • 2.Qxe5#
      • 1...Qh1
        • 2.Sxc2#
      • 1...Re4
        • 2.Sf5#
      • 1...Rf4
        • 2.Rxf4#
      • 1...Rh4
        • 2.Qxh4#
      • 1...Rg5
        • 2.Rf4#
      • 1...Be6
        • 2.exd6#
      • 1...e6
        • 2.Rc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 7
  • Sets
    • Q(a);N_GUARD,XR(C)::S(B),XP(b)
    • Q(a);N_GUARD::S(B),XP(b)
    • R(c);OGATE,XS(B)::P(A),XR(c)
    • R(f);N_GUARD::R(C)
    • R(f);SBLOCK::S(B)
    • R(f);N_GUARD::R(C),XR(f)
    • R(f);N_GUARD,XB(G)::R(C)
    • P(h);N_GUARD,S_CUTB(i)::QAR2(H),XP(g)
  • Tries
    • Try
      • Q(H);CHECK,XP(g)
      • Refutation
        • P(h);XQ(H)
  • Actual
    • Q(H);N_PINP(g)
    • Threat
      • QAB(H)+P(E)
    • Vars
      • Q(a);N_GUARD,XR(C)::S(B),XP(b)
      • R(c);OGATE,XS(B)::P(A),XR(c)
      • R(f);N_GUARD,XB(G)::R(C)
      • B(i);N_GUARD,XB(G)::R1(D)
      • P(g);OGATE,P_SPINP(g),XP(E)::QAB1(H),XP(g)
      • Q(a);N_GUARD::S(B),XP(b)
      • R(f);SBLOCK::S(B)
      • R(f);N_GUARD::R(C),XR(f)
      • R(f);OGATEB::QAR(H),XR(f)
      • R(f);N_GUARD::R(C)
      • B(i);S_CUTP(h)::QAB(H)+P(E),XP(g)
      • P(h);S_CUTB(i)::R1(D)
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