MESON Chess Problem Database

Problem Display
PID: 271570 (4N2r/r4b2/p1P1pR2/QqN1kB2/2p1P1nB/4P1P1/n2RK3/2b5 w - - 0 1)

Pickering, AS

Sunday Referee, 1933

(First published on Sun May 28 1933)

4N2r/r4b2/p1P1pR2/QqN1kB2/2p1P1nB/4P1P1/n2RK3/2b5

#2

12 + 11

15239 Valois Notebooks 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Qa4
      • 2.Sd3#
      • 2.Sxa4#
      • 2.Sd7#
    • 1...Qxc6
      • 2.Sd3#
      • 2.Sd7#
    • 1...Qb1
      • 2.Sb3#
      • 2.Sd3#
      • 2.Sd7#
    • 1...Qb2
      • 2.Sb3#
      • 2.Sd3#
      • 2.Sd7#
    • 1...Qb3
      • 2.Sxb3#
      • 2.Sd3#
      • 2.Sd7#
    • 1...Qb4
      • 2.Sd3#
      • 2.Sd7#
    • 1...Qxc5
      • 2.Qxc5#
    • 1...Qb6
      • 2.Sd3#
      • 2.Sd7#
    • 1...Qb7
      • 2.Sd3#
      • 2.Sxb7#
      • 2.Sd7#
    • 1...Qb8
      • 2.Sd3#
      • 2.Sb7#
      • 2.Sd7#
    • 1...Rc7
      • 2.Qxc7#
    • 1...Rd7
      • 2.Sxd7#
    • 1...Ra8
      • 2.Sd7#
      • 2.Qc7#
    • 1...Bh5
      • 2.Rxe6#
    • 1...Bg6
      • 2.Rxe6#
    • 1...Bxe8
      • 2.Rxe6#
    • 1...Sc3+
      • 2.Qxc3#
    • 1...Sxf6
      • 2.Bxf6#
    • 1...c3+
      • 2.Sd3#
    • 1...exf5
      • 2.Rxf5#
  • Keys
    • 1.c7!
      • threat
        • 2.Sd7#
      • 1...Sc3+
        • 2.Qxc3#
      • 1...c3+
        • 2.Sd3#
      • 1...Qxc5
        • 2.Qxc5#
      • 1...Rxc7
        • 2.Qxc7#
      • 1...Bxe8
        • 2.Rxe6#
      • 1...Sxf6
        • 2.Bxf6#
      • 1...exf5
        • 2.Rxf5#
      • 1...Qd7
        • 2.Sd3#
        • 2.Sxd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 3
  • Sets
    • Q(e);OGATE,P_SPINQ(e),XS(H)::QAR2(G),XQ(e)
    • R(i);N_GUARD::QAB(G),XR(i)
    • R(i);N_GUARD::S(H),XR(i)
    • B(j);N_GUARD::R1(K),XP(h)
    • B(j);N_GUARD,XS(L)::R1(K),XP(h)
    • S(b);CHECK,N_GUARD::QAB(G),XS(b)
    • S(d);OGATE,XR(K)::B(F),XS(d)
    • P(c);CHECK,N_GUARD::S(H)
    • P(h);OGATE,XB(I)::R1(K),XP(h)
  • Actual
    • P(J);
    • Threat
      • S(H)
    • Vars
      • S(b);CHECK,N_GUARD::QAB(G),XS(b)
      • P(c);CHECK,N_GUARD::S(H)
      • Q(e);OGATE,P_SPINQ(e),XS(H)::QAR2(G),XQ(e)
      • R(i);OGATE,XP(J)::QAB(G),XR(i)
      • B(j);N_GUARD,XS(L)::R1(K),XP(h)
      • S(d);OGATE,XR(K)::B(F),XS(d)
      • P(h);OGATE,XB(I)::R1(K),XP(h)
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