MESON Chess Problem Database

Problem Display
PID: 150881 (8/2B2P1K/1pq2b2/3k2N1/1P1p4/2R4N/5rp1/n2Q4 w - - 0 1)

Snowdon, G (Jr)

The Referee, 1927

(First published on Sun Jan 2 1927)

8/2B2P1K/1pq2b2/3k2N1/1P1p4/2R4N/5rp1/n2Q4

#2

8 + 8

15239 Valois Notebooks 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Ra2
      • 2.Sf4#
      • 2.Qf3#
    • 1...Rb2
      • 2.Sf4#
      • 2.Qf3#
    • 1...Rc2
      • 2.Sf4#
      • 2.Qf3#
    • 1...Rd2
      • 2.Sf4#
      • 2.Qf3#
    • 1...Re2
      • 2.Sf4#
    • 1...Rf3
      • 2.Qxf3#
    • 1...Rf4
      • 2.Sxf4#
  • Tries
    • 1.Qb3+?
      • 1...Qc4
        • 2.Qxc4#
      • 1...Sxb3!
    • 1.Qe1?
      • threat
        • 2.Qe4#
      • 1...Qxc3
        • 2.Qe6#
      • 1...Qxc7
        • 2.Qe6#
      • 1...Bxg5
        • 2.Qe5#
      • 1...Qe6
        • 2.Qxe6#
      • 1...Re2
        • 2.Sf4#
      • 1...Rf4
        • 2.Sxf4#
      • 1...Qe8!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Qe4#
      • 1...Qxc3
        • 2.Qe6#
      • 1...Qxc7
        • 2.Qe6#
      • 1...Rxe2
        • 2.Sf4#
      • 1...Bxg5
        • 2.Qe5#
      • 1...Qe8
        • 2.Qc4#
      • 1...Qe6
        • 2.Qc4#
        • 2.Qb5#
        • 2.Qxe6#
      • 1...Rf4
        • 2.Sxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • R(b);N_GUARD::S(C)
    • R(b);N_GUARD::QAB(A),XR(b)
    • R(b);N_GUARD::S(C),XR(b)
  • Tries
    • Try
      • Q(A);CHECK,N_PINP(d)
      • Vars
        • Q(g);N_GUARD,P_SPINQ(g)::QAB1(A),XQ(g)
      • Refutation
        • S(a);XQ(A)
    • Try
      • Q(A);N_PINP(d)
      • Threat
        • QAB1(A)
      • Vars
        • Q(g);N_GUARD,XR(B)::QAB1(A)
        • Q(g);N_GUARD,P_PINP(G),XB(F)::QAB1(A)
        • B(h);N_GUARD,XS(E)::QAR1(A)
        • Q(g);N_GUARD::QAB1(A),XQ(g)
        • R(b);N_GUARD::S(C)
        • R(b);N_GUARD::S(C),XR(b)
      • Refutation
        • Q(g);
  • Actual
    • Q(A);N_PINP(d)
    • Threat
      • QAB1(A)
    • Vars
      • Q(g);N_GUARD,XR(B)::QAB1(A)
      • Q(g);N_GUARD,P_PINP(G),XB(F)::QAB1(A)
      • R(b);N_GUARD,XQ(A)::S(C)
      • B(h);N_GUARD,XS(E)::QAR1(A)
      • Q(g);N_GUARD::QAB1(A)
      • R(b);N_GUARD::S(C),XR(b)
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