MESON Chess Problem Database

Problem Display
PID: 161194 (4QB2/K1p5/8/3N1P2/2Bk2rR/4N3/2R2q1n/7b w - - 0 1)

Stott, Thomas Middleton

The Observer, 1922

(First published on Sun Jul 2 1922)

4QB2/K1p5/8/3N1P2/2Bk2rR/4N3/2R2q1n/7b

#2

9 + 6

15239 Valois Notebooks 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Qg1
      • 2.Rd2#
    • 1...Qxe3
      • 2.Qxe3#
    • 1...Qg3
      • 2.Rd2#
    • 1...Qxh4
      • 2.Rd2#
    • 1...Qd2
      • 2.Rxd2#
    • 1...Qf3
      • 2.Rd2#
    • 1...Qf4
      • 2.Rd2#
    • 1...Qxf5
      • 2.Sxf5#
    • 1...Sf3
      • 2.Rxg4#
    • 1...c5
      • 2.Bg7#
  • Tries
    • 1.Bd6?
      • threat
        • 2.Qe5#
      • 1...Qxe3
        • 2.Qxe3#
      • 1...Qxf5
        • 2.Sxf5#
      • 1...Qg3
        • 2.Rd2#
      • 1...Qf4
        • 2.Rd2#
      • 1...Sf3
        • 2.Rxg4#
      • 1...cxd6!
    • 1.Rxg4+?
      • 1...Qf4
        • 2.Rd2#
      • 1...Be4
        • 2.Rxe4#
        • 2.Qxe4#
      • 1...Sxg4!
  • Keys
    • 1.Qe7!
      • threat
        • 2.Bg7#
      • 1...Qxe3
        • 2.Qxe3#
      • 1...Qxh4
        • 2.Rd2#
      • 1...Qxf5
        • 2.Sxf5#
      • 1...Qg3
        • 2.Rd2#
      • 1...Qf4
        • 2.Rd2#
      • 1...Be4
        • 2.Qf6#
      • 1...Sf3
        • 2.Rxg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • Q(b);N_GUARD::R(A)
    • Q(b);OGATE,XS(B)::QAB1(H),XQ(b)
    • Q(b);N_GUARD,N_SPINR(e),XR(D)::R(A)
    • Q(b);N_GUARD::R(A),XQ(b)
    • Q(b);N_GUARD,N_SPINR(e)::R(A)
    • Q(b);XP(F)::S(B),XQ(b)
    • S(c);N_GUARD,S_CUTB(a),S_CUTQ(b)::R(D),XR(e)
    • P(f);SBLOCK::B(I)
  • Tries
    • Try
      • B(I);
      • Threat
        • QAB1(H)
      • Vars
        • Q(b);OGATE,XS(B)::QAB1(H),XQ(b)
        • Q(b);XP(F)::S(B),XQ(b)
        • Q(b);N_GUARD::R(A)
        • Q(b);N_GUARD,N_SPINR(e)::R(A)
        • S(c);N_GUARD,S_CUTB(a),S_CUTQ(b)::R(D),XR(e)
      • Refutation
        • P(f);XB(I)
    • Try
      • R(D);CHECK,XR(e)
      • Vars
        • Q(b);P_SPINQ(b)::R(A)
      • Refutation
        • S(c);XR(D)
  • Actual
    • Q(H);
    • Threat
      • B(I)
    • Vars
      • Q(b);OGATE,XS(B)::QAB1(H),XQ(b)
      • Q(b);N_GUARD,N_SPINR(e),XR(D)::R(A)
      • Q(b);XP(F)::S(B),XQ(b)
      • Q(b);N_GUARD::R(A)
      • Q(b);N_GUARD,N_SPINR(e)::R(A)
      • B(a);N_SPINR(e),SBLOCK::QAB(H)
      • S(c);N_GUARD,S_CUTB(a),S_CUTQ(b)::R(D),XR(e)
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