MESON Chess Problem Database

Problem Display
PID: 141436 (5Q2/8/2r5/3n4/4kP2/8/4NK2/3B4 w - - 0 1)

Midwinter, B

The Referee, 1926

(First published on Sun Nov 28 1926)

5Q2/8/2r5/3n4/4kP2/8/4NK2/3B4

#2

5 + 3

14868 Pirnie Collection 2011
5454 Near Snap 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Rc2
      • 2.Bxc2#
    • 1...Ra6
      • 2.Bc2#
    • 1...Rb6
      • 2.Bc2#
    • 1...Rd6
      • 2.Bc2#
    • 1...Re6
      • 2.Bc2#
    • 1...Rf6
      • 2.Bc2#
    • 1...Rg6
      • 2.Bc2#
    • 1...Rh6
      • 2.Bc2#
  • Keys
    • 1.Qd6!
      • 1...Kd3
        • 2.Qxd5#
      • 1...Kf5
        • 2.Sg3#
      • 1...Rxd6
        • 2.Bc2#
      • 1...Sxf4
        • 2.Sg3#
      • 1...Rc1
        • 2.Qg6#
      • 1...Rc2
        • 2.Bxc2#
        • 2.Qg6#
      • 1...Rc3
        • 2.Qg6#
      • 1...Rc4
        • 2.Qg6#
      • 1...Rc5
        • 2.Qg6#
      • 1...Ra6
        • 2.Bc2#
      • 1...Rb6
        • 2.Bc2#
      • 1...Rc7
        • 2.Qg6#
      • 1...Rc8
        • 2.Qg6#
      • 1...Sc3
        • 2.Sg3#
        • 2.Bc2#
      • 1...Se3
        • 2.Sg3#
      • 1...Sb4
        • 2.Sg3#
      • 1...Sb6
        • 2.Sg3#
      • 1...Sf6
        • 2.Sg3#
      • 1...Sc7
        • 2.Sg3#
      • 1...Se7
        • 2.Sg3#

Anticipated by 2463(1881)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 15
    • REMOVED MATES = 5
  • Sets
    • R(c);N_GUARD,P_PINS(B)::B(A),XR(c)
    • R(c);N_GUARD::B(A)
    • R(c);N_GUARD,P_PINP(D)::B(A)
  • Actual
    • Q(E);
    • Vars
      • K(a);P_SPINS(b),S_FLIGHT::QAR2(E),XS(b)
      • K(a);S_FLIGHT::S(B)
      • R(c);N_GUARD,XQ(E)::B(A)
      • S(b);XP(D)::S(B)
      • R(c);N_GUARD::QAB(E)
      • R(c);N_GUARD::B(A)
      • S(b);::S(B)
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