MESON Chess Problem Database

Problem Display
PID: 141887 (2Kn1b2/2pp2p1/R1b1kNP1/R1rNp3/1B6/4P3/5Q2/7B w - - 0 1)

Day, RC

The Referee, 1926

(First published on Sun Dec 12 1926)

2Kn1b2/2pp2p1/R1b1kNP1/R1rNp3/1B6/4P3/5Q2/7B

#2

10 + 9

14868 Pirnie Collection 2011
15239 Valois Notebooks 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Rc1
      • 2.Sxc7#
    • 1...Rc2
      • 2.Sxc7#
    • 1...Rc3
      • 2.Sxc7#
    • 1...Rc4
      • 2.Sxc7#
    • 1...Rxa5
      • 2.Sxc7#
    • 1...Rb5
      • 2.Sxc7#
    • 1...Rxd5
      • 2.Bxd5#
    • 1...gxf6
      • 2.Qxf6#
  • Tries
    • 1.Sxc7+?
      • 1...Kd6
        • 2.Bxc5#
      • 1...Ke7!
    • 1.Se8?
      • 1...Rxa5
        • 2.Sdxc7#
        • 2.Sexc7#
      • 1...Rxd5
        • 2.Sxc7#
        • 2.Bxd5#
      • 1...Rc1
        • 2.Sdxc7#
        • 2.Sexc7#
      • 1...Rc2
        • 2.Sdxc7#
        • 2.Sexc7#
      • 1...Rc3
        • 2.Sdxc7#
        • 2.Sexc7#
      • 1...Rc4
        • 2.Sdxc7#
        • 2.Sexc7#
      • 1...Rb5
        • 2.Sdxc7#
        • 2.Sexc7#
      • 1...Bd6
        • 2.Sxg7#
      • 1...Be7
        • 2.Sdxc7#
      • 1...Sb7
        • 2.Qf7#
      • 1...Sf7
        • 2.Qxf7#
      • 1...d6
        • 2.Sexc7#
      • 1...e4!
    • 1.Qf5+?
      • 1...Kd6
        • 2.Se8#
        • 2.Bxc5#
        • 2.Qxd7#
      • 1...Kxf5!
  • Keys
    • 1.Se4!
      • 1...Kxd5
        • 2.Qa2#
      • 1...Rxa5
        • 2.Sg5#
        • 2.Sxc7#
      • 1...Rxd5
        • 2.Sg5#
      • 1...Rc1
        • 2.Sg5#
        • 2.Sxc7#
      • 1...Rc2
        • 2.Sg5#
        • 2.Sxc7#
      • 1...Rc3
        • 2.Sg5#
        • 2.Sxc7#
      • 1...Rc4
        • 2.Sg5#
        • 2.Sxc7#
      • 1...Rb5
        • 2.Sg5#
        • 2.Sxc7#
      • 1...Bd6
        • 2.Sg5#
      • 1...Be7
        • 2.Sxc7#
      • 1...Sb7
        • 2.Qf7#
      • 1...Sf7
        • 2.Qxf7#
      • 1...d6
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 7
  • Sets
    • R(a);::S(F),XP(e)
    • R(a);XR(E)::S(F),XP(e)
    • R(a);OGATE,XS(F)::B(A),XR(a)
    • P(g);OGATE,XS(H)::QAR1(B),XP(g)
  • Tries
    • Try
      • S(F);CHECK,XP(e)
      • Vars
        • K(d);P-FLIGHT,P_SPINR(a)::B(D),XR(a)
      • Refutation
        • K(d);N_SPINB(c),P-FLIGHT,P_SPINR(a)
    • Try
      • S(H);
      • Vars
        • B(i);N_GUARD,N_SPINB(c),SBLOCK::S(H),XP(g)
        • B(i);SBLOCK::S(F),XP(e)
        • S(h);N_GUARD::QAB1(B)
        • S(h);N_GUARD::QAB1(B),XS(h)
        • P(f);N_SPINB(c),SBLOCK::S(H),XP(e)
      • Refutation
        • P(b);
    • Try
      • Q(B);CHECK
      • Refutation
        • K(d);N_SPINB(c),S_FLIGHT,XQ(B)
  • Actual
    • S(H);
    • Vars
      • K(d);N_SPINB(c),OGATEB,P_SPINR(a),S_FLIGHT,XS(F)::QAB(B)
      • R(a);XS(F)::S(H)
      • B(i);N_SPINB(c),SBLOCK::S(H)
      • B(i);SBLOCK::S(F),XP(e)
      • S(h);N_GUARD::QAB1(B)
      • S(h);N_GUARD::QAB1(B),XS(h)
      • P(f);N_SPINB(c),SBLOCK::S(H)
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