MESON Chess Problem Database

Problem Display
PID: 269205 (K4b2/2Q5/1p1p4/n2k4/P1NN3R/8/1PP2B1p/1r1R1b1q w - - 0 1)

Thomson, Robert Gavin

Sunday Referee, 1930

(First published on Sun Sep 7 1930)

K4b2/2Q5/1p1p4/n2k4/P1NN3R/8/1PP2B1p/1r1R1b1q

#2

10 + 9

15239 Valois Notebooks 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Sb3
      • 2.Qc6#
    • 1...Sc6
      • 2.Qxc6#
    • 1...Sb7
      • 2.Qc6#
  • Tries
    • 1.Bg3?
      • threat
        • 2.Se3#
        • 2.Sxb6#
      • 1...Rxb2
        • 2.Se3#
      • 1...Sxc4
        • 2.Qc6#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Qf3
        • 2.Sxb6#
      • 1...Qe4
        • 2.Sxb6#
      • 1...Qg1
        • 2.Sxb6#
      • 1...Bh6
        • 2.Sxb6#
      • 1...b5
        • 2.Se3#
        • 2.Sb6#
      • 1...Bxc4!
    • 1.Qxd6+?
      • 1...Kxc4+
        • 2.Sf3#
      • 1...Bxd6!
    • 1.Qb7+?
      • 1...Kxc4
        • 2.Sf3#
      • 1...Kc5
        • 2.Sc6#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sxb7!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Qb5#
      • 1...Kxc4+
        • 2.Sf3#
      • 1...Kc5+
        • 2.Sc6#
      • 1...Rxb2
        • 2.Se2#
      • 1...Bxc4
        • 2.Qf5#
      • 1...Sb3
        • 2.Qc6#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sb7
        • 2.Qc6#
      • 1...b5
        • 2.Qxb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(e);N_GUARD::QAB1(I)
    • S(e);N_GUARD::QAB1(I),XS(e)
  • Tries
    • Try
      • B(D);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);XP(B)::S(F)
        • S(e);N_GUARD,XS(F)::QAB1(I)
        • S(e);N_GUARD::QAB1(I),XS(e)
        • Q(c);::S(F),XP(g)
        • B(i);::S(F),XP(g)
      • Refutation
        • B(b);XS(F)
    • Try
      • Q(I);CHECK,XP(h)
      • Vars
        • K(f);CHECK,S_FLIGHT,XS(F)::R(H)+S(G)
      • Refutation
        • B(i);XQ(I)
    • Try
      • Q(I);CHECK
      • Vars
        • K(f);N_GUARD,P_PINQ(I),S_FLIGHT,XS(F)::R(H)+S(G)
        • K(f);N_GUARD,P-FLIGHT,P_PINQ(I),S_CUTB(b),S_CUTR(a)::B(D)+S(G)
        • S(e);N_GUARD,P_SPINS(e)::QAB1(I),XS(e)
      • Refutation
        • S(e);XQ(I)
  • Actual
    • Q(I);P_PINP(h)
    • Threat
      • QAR2(I)
    • Vars
      • K(f);CHECK,N_SPINP(h),S_CUTB(b),S_CUTR(a),S_FLIGHT,XS(F)::R(H)+S(G)
      • K(f);CHECK,N_SPINP(h),P-FLIGHT,S_CUTB(b),S_CUTR(a)::B(D)+S(G)
      • R(a);N_GUARD,XP(B)::R(A)+S(G)
      • B(b);SBLOCK,XS(F)::QAR2(I)
      • S(e);N_GUARD::QAB1(I)
      • S(e);N_GUARD::QAB1(I),XS(e)
      • P(g);::QAR2(I),XP(g)
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