MESON Chess Problem Database

Problem Display
PID: 394 (8/7N/4p1p1/6Bk/4q3/5R1P/4B3/7K w - - 0 1)

Mansfield, Comins

The Observer, 1941

(First published on Sun Mar 16 1941)

8/7N/4p1p1/6Bk/4q3/5R1P/4B3/7K

#2

6 + 4

45 Schach 1951
3310 2345 Chess Problems 1997
3550 Complete Mansfield/II 1997
14868 Pirnie Collection 2013
15239 Valois Notebooks 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1+
      • 2.Rf1#
    • 1...Qd3
      • 2.Rxd3#
    • 1...Qxf3+
      • 2.Bxf3#
    • 1...Qf5
      • 2.Rxf5#
    • 1...Qe3
      • 2.Rxe3#
    • 1...Qa4
      • 2.Rf4#
    • 1...Qb4
      • 2.Rf4#
    • 1...Qd4
      • 2.Rf4#
    • 1...Qf4
      • 2.Rxf4#
    • 1...Qe5
      • 2.Re3#
  • Keys
    • 1.h4!
      • threat
        • 2.Sf6#
      • 1...Qb1+
        • 2.Rf1#
      • 1...Qxf3+
        • 2.Bxf3#
      • 1...Qxh4+
        • 2.Rh3#
      • 1...Kg4
        • 2.Sf6#
      • 1...Qf5
        • 2.Rxf5#
      • 1...Qd4
        • 2.Rf4#
      • 1...Qf4
        • 2.Rxf4#
      • 1...Qe5
        • 2.Re3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • Q(a);CHECK,N_PINR(C)::B(B)+R(C)
    • Q(a);N_PINR(C)::B(B)+R(C),XQ(a)
    • Q(a);CHECK,OGATE,P_SPINQ(a),XR(C)::B(B),XQ(a)
    • Q(a);N_PINR(C)::B(B)+R(C)
  • Actual
    • P(D);
    • Threat
      • S(F)
    • Vars
      • Q(a);CHECK,N_PINR(C)::B(B)+R(C)
      • Q(a);CHECK,OGATE,P_SPINQ(a),XR(C)::B(B),XQ(a)
      • Q(a);CHECK,N_PINR(C),XP(D)::B(B)+R(C)
      • K(b);S_FLIGHT::S(F)
      • Q(a);N_PINR(C)::B(B)+R(C),XQ(a)
      • Q(a);N_PINR(C)::B(B)+R(C)
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