MESON Chess Problem Database

Problem Display
PID: 267570 (3BbNn1/2ppr3/Rb3kPP/1Q4p1/4P1pn/p5p1/2KP1q2/5R2 w - - 0 1)

Thomson, Robert Gavin

Sunday Referee, 1939

(First published on Sun Mar 12 1939)

3BbNn1/2ppr3/Rb3kPP/1Q4p1/4P1pn/p5p1/2KP1q2/5R2

#2

10 + 13

15239 Valois Notebooks 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Sf3
      • 2.Qf5#
    • 1...Sf5
      • 2.e5#
    • 1...a2
      • 2.Qb2#
  • Tries
    • 1.Sh7+?
      • 1...Ke6
        • 2.Qd5#
      • 1...Kxg6!
    • 1.Rxf2+?
      • 1...Sf3
        • 2.Qf5#
      • 1...Sf5
        • 2.Rxf5#
        • 2.Qxf5#
        • 2.e5#
      • 1...gxf2!
  • Keys
    • 1.Qd5!
      • threat
        • 2.Qd4#
      • 1...Bxg6
        • 2.Sxd7#
      • 1...Sxg6
        • 2.Sh7#
      • 1...Sf3
        • 2.Qf5#
      • 1...Sf5
        • 2.e5#
      • 1...c5
        • 2.Qd6#
      • 1...c6
        • 2.Qd6#
      • 1...d6
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • S(e);N_GUARD,N_SPINQ(a),S_CUTQ(a)::QAR1(E)
    • S(e);N_SPINQ(a),SBLOCK::P(D)
    • P(b);N_GUARD::QAB(E)
  • Tries
    • Try
      • S(J);CHECK
      • Vars
        • K(h);N_GUARD,N_SPINQ(a),N_SPINR(k),P-FLIGHT::QAB1(E)
      • Refutation
        • K(h);N_SPINQ(a),N_SPINR(k),P-FLIGHT,XP(G)
    • Try
      • R(A);CHECK,N_SPINP(C),XQ(a)
      • Vars
        • S(e);N_GUARD,P_SPINS(e)::QAR1(E)
      • Refutation
        • P(c);XR(A)
  • Actual
    • Q(E);
    • Threat
      • QAB(E)
    • Vars
      • B(l);N_GUARD,SBLOCK,XP(G)::S(J),XP(j)
      • S(e);SBLOCK,XP(G)::S(J)
      • S(e);N_GUARD,N_SPINQ(a),S_CUTQ(a)::QAR1(E)
      • S(e);N_SPINQ(a),SBLOCK::P(D)
      • P(i);N_GUARD::QAR2(E)
      • P(i);N_GUARD,N_SPINB(g)::QAR2(E)
      • P(j);N_GUARD,N_SPINB(g)::QAR1(E)
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