MESON Chess Problem Database

Problem Display
PID: 219386 (8/B4Q2/2p2NK1/3p3p/R1N5/2pk2p1/1b5q/3Bn3 w - - 0 1)

Thomson, Robert Gavin

British Chess Magazine, 1924

8/B4Q2/2p2NK1/3p3p/R1N5/2pk2p1/1b5q/3Bn3

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qd2
      • 2.Se5#
    • 1...dxc4
      • 2.Qd7#
    • 1...c5
      • 2.Qxd5#
  • Tries
    • 1.Qe6?
      • threat
        • 2.Qf5#
        • 2.Qe3#
      • 1...dxc4
        • 2.Qd7#
        • 2.Qe3#
        • 2.Qd6#
      • 1...c2
        • 2.Qe3#
      • 1...c5
        • 2.Qxd5#
        • 2.Qe3#
      • 1...Qh1
        • 2.Qe2#
        • 2.Qe3#
      • 1...Qg1
        • 2.Qf5#
        • 2.Qe2#
      • 1...Qd2
        • 2.Se5#
        • 2.Qf5#
      • 1...Qe2
        • 2.Qxe2#
      • 1...Qg2
        • 2.Qe3#
      • 1...Qh3
        • 2.Qe2#
        • 2.Qe3#
      • 1...Qh4
        • 2.Qe2#
        • 2.Qe3#
      • 1...Bc1
        • 2.Qf5#
      • 1...Sc2
        • 2.Qf5#
      • 1...Sg2
        • 2.Qf5#
        • 2.Qe2#
      • 1...d4
        • 2.Qf5#
        • 2.Qe4#
      • 1...Qf2!
  • Keys
    • 1.Se4!
      • threat
        • 2.Se5#
      • 1...Kxe4
        • 2.Qf5#
      • 1...dxc4
        • 2.Qxc4#
      • 1...dxe4
        • 2.Qd7#
      • 1...c5
        • 2.Qxd5#
      • 1...Sf3
        • 2.Qxf3#
      • 1...c2
        • 2.Sxb2#
      • 1...g2
        • 2.Sf2#
      • 1...d4
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • Q(c);SBLOCK::S(C)
    • P(g);OGATEB,XS(C)::QAR(G)
    • P(i);N_GUARD::QAR2(G),XP(g)
  • Tries
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • P(d);::QAR1(G)
        • Q(c);N_GUARD::QAB1(G),XQ(c)
        • Q(c);::QAR1(G)
        • B(b);::QAB(G)
        • S(a);::QAB(G)
      • Refutation
        • Q(c);
  • Actual
    • S(D);
    • Threat
      • S(C)
    • Vars
      • K(e);OGATEB,S_FLIGHT,XS(D)::QAB1(G)
      • P(g);OGATE,XS(C)::QAB1(G),XP(g)
      • P(g);OGATEB,SBLOCK,XS(D)::QAR(G)
      • P(i);N_GUARD::QAR2(G),XP(g)
      • S(a);N_GUARD::QAR2(G),XS(a)
      • P(d);N_GUARD,S_CUTQ(c)::S(C),XB(b)
      • P(f);N_GUARD,S_CUTQ(c)::S(D)
      • P(g);SBLOCK::S(D)
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