MESON Chess Problem Database

Problem Display
PID: 200769 (5Qbq/1Kp5/1b2P1pp/N4pr1/3k4/4RB2/1Pn1P3/2B5 w - - 0 1)

Barron, Philip

The Observer, 1948

(First published on Sun Oct 24 1948)

5Qbq/1Kp5/1b2P1pp/N4pr1/3k4/4RB2/1Pn1P3/2B5

#2

9 + 10

15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5
      • 2.Rd3#
    • 1...Sa1
      • 2.Qb4#
    • 1...Se1
      • 2.Qb4#
    • 1...Sb4
      • 2.Qxb4#
    • 1...c5
      • 2.Qd6#
    • 1...c6
      • 2.Qd6#
  • Tries
    • 1.Kc6?
      • threat
        • 2.Qd8#
      • 1...Sb4+
        • 2.Qxb4#
      • 1...Bxa5
        • 2.Qc5#
      • 1...Bxe6
        • 2.Qxh8#
      • 1...Qe5
        • 2.Rd3#
      • 1...Qf6
        • 2.Qxf6#
      • 1...Qg7
        • 2.Qxg7#
      • 1...Qh7
        • 2.Qf6#
      • 1...Bc5
        • 2.Qxc5#
      • 1...Bf7
        • 2.Qxh8#
      • 1...Bh7
        • 2.Qxh8#
      • 1...f4
        • 2.Re4#
        • 2.Qxf4#
      • 1...Sxe3!
    • 1.b3?
      • threat
        • 2.Sc6#
      • 1...Sxe3
        • 2.Bb2#
      • 1...Sb4
        • 2.Qxb4#
      • 1...c6
        • 2.Sxc6#
        • 2.Qd6#
      • 1...Bxa5!
  • Keys
    • 1.b4!
      • threat
        • 2.Qd8#
      • 1...Bxa5
        • 2.Qc5#
      • 1...Bxe6
        • 2.Qxh8#
      • 1...Sxe3
        • 2.Bb2#
      • 1...Sxb4
        • 2.Qxb4#
      • 1...Qe5
        • 2.Rd3#
      • 1...Qf6
        • 2.Qxf6#
      • 1...Qg7
        • 2.Qxg7#
      • 1...Qh7
        • 2.Qf6#
      • 1...Bc5
        • 2.Qxc5#
      • 1...Bf7
        • 2.Qxh8#
      • 1...Bh7
        • 2.Qxh8#
      • 1...f4
        • 2.Qxf4#
      • 1...c5
        • 2.Qd6#
      • 1...c6
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 2
  • Sets
    • Q(j);SBLOCK::R1(D)
    • S(a);N_GUARD::QAR2(I)
    • S(a);N_GUARD::QAR2(I),XS(a)
    • P(h);N_GUARD::QAR2(I)
  • Tries
    • Try
      • K(H);S_FLIGHT
      • Threat
        • QAR(I)
      • Vars
        • S(a);CHECK,N_GUARD::QAR2(I),XS(a)
        • B(e);N_GUARD,XS(F)::QAB1(I)
        • B(i);OGATE,XP(G)::QAB(I),XQ(j)
        • Q(j);SBLOCK::R1(D)
        • Q(j);N_GUARD,P_PINP(G)::QAB(I),XQ(j)
        • Q(j);N_GUARD::QAB(I),XQ(j)
        • Q(j);N_GUARD::QAB(I)
        • B(e);N_GUARD::QAB1(I),XB(e)
        • B(i);OGATE::QAB(I),XQ(j)
      • Refutation
        • S(a);XR(D)
    • Try
      • P(B);
      • Threat
        • S(F)
      • Vars
        • S(a);SBLOCK,XR(D)::B(A)
        • S(a);N_GUARD::QAR2(I),XS(a)
      • Refutation
        • B(e);XS(F)
  • Actual
    • P(B);
    • Threat
      • QAR(I)
    • Vars
      • B(e);N_GUARD,XS(F)::QAB1(I)
      • B(i);OGATE,XP(G)::QAB(I),XQ(j)
      • S(a);SBLOCK,XR(D)::B(A)
      • S(a);OGATE,XP(B)::QAR2(I),XS(a)
      • Q(j);SBLOCK::R1(D)
      • Q(j);N_GUARD::QAB(I),XQ(j)
      • Q(j);N_GUARD::QAB(I)
      • B(e);N_GUARD::QAB1(I),XB(e)
      • B(i);OGATE::QAB(I),XQ(j)
      • P(c);OGATE::QAR2(I),XP(c)
      • P(h);N_GUARD::QAR2(I)
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