MESON Chess Problem Database

Problem Display
PID: 151481 (8/3n1B2/1q1p4/Np5Q/1r1k1K2/BP6/1N1P4/7b w - - 0 1)

Stephens, Walter

The Referee, 1927

(First published on Sun Jul 3 1927)

8/3n1B2/1q1p4/Np5Q/1r1k1K2/BP6/1N1P4/7b

#2

8 + 7

15239 Valois Notebooks 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb3
      • 2.Sxb3#
    • 1...Bd5
      • 2.Qxd5#
    • 1...Sc5
      • 2.Qh8#
  • Tries
    • 1.Qe2?
      • threat
        • 2.Qf2#
        • 2.Qe3#
      • 1...Rxb3
        • 2.Sxb3#
      • 1...Kc5+!
    • 1.Qxh1?
      • threat
        • 2.Qd5#
        • 2.Qg1#
      • 1...Rxb3
        • 2.Sxb3#
        • 2.Qe4#
        • 2.Qd5#
      • 1...Qc5
        • 2.Qe4#
        • 2.Qg1#
      • 1...Qc6
        • 2.Qg1#
      • 1...Qb7
        • 2.Qg1#
      • 1...Sf6
        • 2.Qg1#
      • 1...d5
        • 2.Qxd5#
        • 2.Qg1#
      • 1...Kc5+!
    • 1.Qh2?
      • threat
        • 2.Qg1#
        • 2.Qf2#
      • 1...Rxb3
        • 2.Sxb3#
      • 1...Bg2
        • 2.Qg1#
      • 1...Kc5+!
    • 1.Qh4?
      • threat
        • 2.Qf2#
      • 1...Rxb3
        • 2.Sxb3#
      • 1...Kc5+!
    • 1.Qg5?
      • threat
        • 2.Qg1#
      • 1...Rxb3
        • 2.Sxb3#
      • 1...Bg2!
  • Keys
    • 1.Qd1!
      • threat
        • 2.Qg1#
      • 1...Kc5+
        • 2.d4#
      • 1...Rxb3
        • 2.Sxb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • R(b);XP(D)::S(F),XR(b)
    • B(a);N_GUARD::QAR1(G),XB(a)
    • S(g);N_GUARD,SBLOCK::QAB(G)
  • Tries
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • R(b);XP(D)::S(F),XR(b)
      • Refutation
        • K(c);CHECK,P_SPINR(b),S_FLIGHT
    • Try
      • Q(G);XB(a)
      • Threat
        • DUALS(2)
      • Vars
        • Q(e);::QAB(G)
        • S(g);::QAB(G)
      • Refutation
        • K(c);CHECK,P_SPINR(b),S_FLIGHT
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • R(b);XP(D)::S(F),XR(b)
        • B(a);::QAB(G)
      • Refutation
        • K(c);CHECK,P_SPINR(b),S_FLIGHT
    • Try
      • Q(G);
      • Threat
        • QAB(G)
      • Vars
        • R(b);XP(D)::S(F),XR(b)
      • Refutation
        • K(c);CHECK,P_SPINR(b),S_FLIGHT
    • Try
      • Q(G);
      • Threat
        • QAB(G)
      • Vars
        • R(b);XP(D)::S(F),XR(b)
      • Refutation
        • B(a);
  • Actual
    • Q(G);
    • Threat
      • QAB(G)
    • Vars
      • K(c);CHECK,OGATE,P_SPINR(b),S_FLIGHT::P(B)
      • R(b);XP(D)::S(F),XR(b)
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