MESON Chess Problem Database

Problem Display
PID: 22103 (3B4/3p4/3P1rp1/K1Q4b/4Pkqp/2N1p2B/4P2P/6R1 w - - 0 1)

Thomson, Robert Gavin

2nd Place, Grantham Journal, 1924

3B4/3p4/3P1rp1/K1Q4b/4Pkqp/2N1p2B/4P2P/6R1

#2

10 + 8

3098 FIDE Album (1914-1944) (I) 1971

SOLUTION

  • SOUND
  • Sets
    • 1...Qf3
      • 2.Qg5#
    • 1...Qxh3
      • 2.Qg5#
    • 1...Qe6
      • 2.Qg5#
    • 1...Qg5
      • 2.Qxg5#
    • 1...Rxd6
      • 2.Qxd6#
  • Keys
    • 1.Qd4!
      • 1...Qf5+
        • 2.exf5#
      • 1...Qg5+
        • 2.e5#
      • 1...Rf5+
        • 2.e5#
      • 1...Kg5
        • 2.Qxe3#
      • 1...Qxe2
        • 2.Qxf6#
      • 1...Qxh3
        • 2.Sd5#
      • 1...Qxg1
        • 2.Qxf6#
      • 1...Rxd6
        • 2.Qxd6#
      • 1...Qf3
        • 2.Sd5#
        • 2.Qxf6#
      • 1...Qe6
        • 2.e5#
      • 1...Qg2
        • 2.Qxf6#
      • 1...Qg3
        • 2.Qxf6#
      • 1...Re6
        • 2.Sd5#
      • 1...Rf7
        • 2.Sd5#
      • 1...Rf8
        • 2.Sd5#
      • 1...g5
        • 2.Sd5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 3
    • ADDED MATES = 11
    • REMOVED MATES = 1
  • Sets
    • Q(c);N_GUARD::QAB1(H)
    • Q(c);N_GUARD,XB(E)::QAB1(H)
    • Q(c);N_GUARD,P_PINQ(H)::QAB1(H),XQ(c)
    • R(f);OGATE,XP(I)::QAB(H),XR(f)
  • Actual
    • Q(H);
    • Vars
      • Q(c);CHECK,OGATE::QAR(H)+P(F),XQ(c)
      • Q(c);CHECK::QAR(H)+P(F)
      • R(f);CHECK,SBLOCK::QAR(H)+P(F)
      • K(b);P_SPINQ(c),P_SPINR(f),S_FLIGHT::QAB(H),XP(a)
      • Q(c);N_GUARD,XP(B)::QAR2(H),XR(f)
      • Q(c);XB(E)::S(D)
      • Q(c);N_GUARD,XR(A)::QAR2(H),XR(f)
      • R(f);OGATE,XP(I)::QAB(H),XR(f)
      • Q(c);::QAR(H)+P(F)
      • Q(c);N_GUARD::QAR2(H),XR(f)
      • R(f);::S(D)
      • P(g);SBLOCK::S(D)
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