MESON Chess Problem Database

Problem Display
PID: 287215 (8/8/7N/3p2pQ/1K1Pk3/2P1B2p/1pP2pq1/1B2nN1b w - - 0 1)

Sumner, Christopher Richard Benson

Grantham Journal, 1924

(First published on Sat Nov 22 1924)

8/8/7N/3p2pQ/1K1Pk3/2P1B2p/1pP2pq1/1B2nN1b

#2

9 + 9

15239 Valois Notebooks 2026

SOLUTION

  • SOUND
  • Sets
    • 1...Qf3
      • 2.Qe8#
    • 1...Qg4
      • 2.Qxg4#
    • 1...Sxc2+
      • 2.Bxc2#
    • 1...Sd3+
      • 2.cxd3#
    • 1...Sf3
      • 2.Qg6#
    • 1...g4
      • 2.Qf5#
  • Tries
    • 1.Bxg5?
      • threat
        • 2.Sd2#
        • 2.Qe2#
      • 1...Sxc2+
        • 2.Bxc2#
      • 1...Sd3+
        • 2.cxd3#
      • 1...Qxf1
        • 2.Qg4#
      • 1...Qg4
        • 2.Sd2#
        • 2.Qxg4#
      • 1...Qf3
        • 2.Sd2#
        • 2.Qe8#
      • 1...Qg3
        • 2.Sd2#
        • 2.Sxg3#
      • 1...Sf3
        • 2.Qg6#
      • 1...Qxg5!
    • 1.Qe2?
      • threat
        • 2.Sd2#
        • 2.Bc1#
        • 2.Bd2#
        • 2.Bxg5#
      • 1...Sxc2+
        • 2.Bxc2#
      • 1...Sd3+
        • 2.cxd3#
      • 1...Qf3
        • 2.Sd2#
      • 1...Qg3
        • 2.Sd2#
        • 2.Sxg3#
      • 1...Qg4
        • 2.Sd2#
        • 2.Qxg4#
      • 1...Sf3
        • 2.Bc1#
        • 2.Bd2#
        • 2.Bxg5#
        • 2.Qd3#
      • 1...g4
        • 2.Sd2#
        • 2.Bc1#
        • 2.Bd2#
        • 2.Bg5#
      • 1...Qxf1!
  • Keys
    • 1.Bd2!
      • threat
        • 2.Qe2#
      • 1...Sxc2+
        • 2.Bxc2#
      • 1...Sd3+
        • 2.cxd3#
      • 1...Qxf1
        • 2.Qg4#
      • 1...Qg4
        • 2.Qxg4#
      • 1...g4
        • 2.Qf5#
      • 1...Qf3
        • 2.Qe8#
      • 1...Qg3
        • 2.Sxg3#
      • 1...Sf3
        • 2.Qg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(e);SBLOCK::QAR(H)
    • Q(e);N_GUARD::QAR2(H),XQ(e)
    • S(a);CHECK,OGATE,P_SPINS(a),XP(C)::B(A),XS(a)
    • S(a);CHECK,OGATE::P(C),XS(a)
    • S(a);SBLOCK::QAB(H)
    • P(i);OGATE::QAB1(H)
  • Tries
    • Try
      • B(E);XP(i)
      • Threat
        • DUALS(2)
      • Vars
        • S(a);CHECK,OGATE,P_SPINS(a),XP(C)::B(A),XS(a)
        • S(a);CHECK,OGATE::P(C),XS(a)
        • Q(e);N_GUARD,XS(B)::QAR2(H)
        • S(a);SBLOCK::QAB(H)
      • Refutation
        • Q(e);XB(E)
    • Try
      • Q(H);
      • Threat
        • DUALS(4)
      • Vars
        • S(a);CHECK,OGATE,P_SPINS(a),XP(C)::B(A),XS(a)
        • S(a);CHECK,OGATE::P(C),XS(a)
        • Q(e);::S(B)
      • Refutation
        • Q(e);XS(B)
  • Actual
    • B(E);
    • Threat
      • QAR2(H)
    • Vars
      • S(a);CHECK,OGATE,P_SPINS(a),XP(C)::B(A),XS(a)
      • S(a);CHECK,OGATE::P(C),XS(a)
      • Q(e);N_GUARD,XS(B)::QAR2(H)
      • Q(e);N_GUARD::QAR2(H),XQ(e)
      • P(i);OGATE::QAB1(H)
      • Q(e);SBLOCK::QAR(H)
      • Q(e);N_GUARD::S(B),XQ(e)
      • S(a);SBLOCK::QAB(H)
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