MESON Chess Problem Database

Problem Display
PID: 363 (4n3/1P1KQp2/b4p2/3k2pN/2r2pP1/2B5/BR2P3/5n2 w - - 0 1)

Warton, Thomas Joseph

The Observer, 1933

(First published on Sun Oct 22 1933)

4n3/1P1KQp2/b4p2/3k2pN/2r2pP1/2B5/BR2P3/5n2

#2

9 + 9

15239 Valois Notebooks 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Bb5+
      • 2.Rxb5#
    • 1...Bxb7
      • 2.Rb5#
    • 1...Sd2
      • 2.Rxd2#
    • 1...Sh2
      • 2.Rd2#
    • 1...Se3
      • 2.Rd2#
    • 1...Sg3
      • 2.Rd2#
    • 1...Sc7
      • 2.Sxf6#
    • 1...Sg7
      • 2.Sxf6#
    • 1...f3
      • 2.e4#
    • 1...f5
      • 2.Qe5#
  • Tries
    • 1.Bxf6?
      • threat
        • 2.Qe5#
      • 1...Bb5+
        • 2.Rxb5#
      • 1...Sxf6+!
    • 1.Qc5+?
      • 1...Ke4
        • 2.Bb1#
      • 1...Kxc5!
    • 1.Qd6+?
      • 1...Ke4
        • 2.Qd3#
      • 1...Sxd6!
    • 1.Qe4+?
      • 1...Kc5
        • 2.Qf5#
        • 2.Qc6#
      • 1...Kxe4!
    • 1.Qe6+?
      • 1...Kc5
        • 2.Qf5#
        • 2.Qc6#
      • 1...fxe6!
    • 1.Qxf7+?
      • 1...Ke4
        • 2.Qe6#
      • 1...Kc5!
    • 1.b8Q?
      • 1...Bb5+
        • 2.Rxb5#
        • 2.Qxb5#
      • 1...Sd6
        • 2.Qbxd6#
      • 1...Sd2
        • 2.Rxd2#
      • 1...Bb7
        • 2.Rb5#
        • 2.Qxb7#
      • 1...Sh2
        • 2.Rd2#
      • 1...Se3
        • 2.Rd2#
      • 1...Sg3
        • 2.Rd2#
      • 1...Sc7
        • 2.Sxf6#
      • 1...Sg7
        • 2.Sxf6#
        • 2.Qbd6#
      • 1...f3
        • 2.e4#
      • 1...f5
        • 2.Qbe5#
        • 2.Qee5#
      • 1...Bc8+!
  • Keys
    • 1.Sg3!
      • 1...Bb5+
        • 2.Rxb5#
      • 1...Bxb7
        • 2.Rb5#
      • 1...Sxg3
        • 2.Rd2#
      • 1...fxg3
        • 2.e4#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Sd2
        • 2.Rxd2#
      • 1...Sh2
        • 2.Rd2#
      • 1...Se3
        • 2.Rd2#
      • 1...Sc7
        • 2.Qd6#
      • 1...Sg7
        • 2.Qd6#
      • 1...f3
        • 2.e4#
      • 1...f5
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(f);CHECK,N_GUARD::R(B),XB(f)
    • B(f);N_GUARD,XP(G)::R(B)
    • S(a);N_GUARD::R(B),XS(a)
    • S(a);N_GUARD::R(B)
    • S(i);N_GUARD::S(F),XP(g)
    • P(c);N_GUARD::P(C)
    • P(g);N_GUARD::QAR1(I)
  • Tries
    • Try
      • B(D);XP(g)
      • Threat
        • QAR1(I)
      • Vars
        • B(f);CHECK,N_GUARD::R(B),XB(f)
      • Refutation
        • S(i);CHECK,XB(D)
    • Try
      • Q(I);CHECK
      • Vars
        • K(d);N_SPINR(b),S_FLIGHT::B(A)
      • Refutation
        • K(d);N_SPINR(b),P-FLIGHT,XQ(I)
    • Try
      • Q(I);CHECK
      • Vars
        • K(d);N_SPINR(b),OGATE,S_FLIGHT::QAB1(I)
      • Refutation
        • S(i);XQ(I)
    • Try
      • Q(I);CHECK
      • Refutation
        • K(d);N_SPINR(b),S_FLIGHT,XQ(I)
    • Try
      • Q(I);CHECK
      • Refutation
        • P(h);XQ(I)
    • Try
      • Q(I);CHECK,XP(h)
      • Vars
        • K(d);N_SPINR(b),S_FLIGHT::QAR2(I)
      • Refutation
        • K(d);N_SPINR(b),P-FLIGHT
    • Try
      • P(G);
      • Vars
        • S(i);N_GUARD::QAR1(G),XS(i)
        • S(a);N_GUARD::R(B),XS(a)
        • S(a);N_GUARD::R(B)
        • S(i);N_GUARD::S(F),XP(g)
        • P(c);N_GUARD::P(C)
      • Refutation
        • B(f);CHECK
  • Actual
    • S(F);
    • Vars
      • B(f);CHECK,N_GUARD::R(B),XB(f)
      • B(f);N_GUARD,XP(G)::R(B)
      • S(a);N_GUARD,XS(F)::R(B)
      • P(c);N_GUARD,XS(F)::P(C)
      • S(i);N_GUARD::QAR1(I),XS(i)
      • S(a);N_GUARD::R(B),XS(a)
      • S(a);N_GUARD::R(B)
      • S(i);N_GUARD::QAR1(I)
      • P(c);N_GUARD::P(C)
      • P(g);N_GUARD::QAR1(I)
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