MESON Chess Problem Database

Problem Display
PID: 272202 (1K6/BppR4/3r4/N1r1p3/n1Pk1n2/1Qp2R2/2BN1P2/1q5b w - - 0 1)

Wallis, Walter Warren

The Observer, 1960

(First published on Sun Oct 2 1960)

1K6/BppR4/3r4/N1r1p3/n1Pk1n2/1Qp2R2/2BN1P2/1q5b

#2

10 + 11

17397 Ling Notebooks 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb3
      • 2.Sdxb3#
      • 2.Saxb3#
    • 1...Bxf3
      • 2.Sxf3#
    • 1...Sb2
      • 2.Qxc3#
    • 1...Sb6
      • 2.Qxc3#
    • 1...Se2
      • 2.Rd3#
    • 1...Sg2
      • 2.Rd3#
    • 1...Sd3
      • 2.Rxd3#
    • 1...Sh3
      • 2.Rd3#
    • 1...Sd5
      • 2.Rd3#
    • 1...Sh5
      • 2.Rd3#
    • 1...Se6
      • 2.Rd3#
    • 1...Sg6
      • 2.Rd3#
    • 1...cxd2
      • 2.Qe3#
    • 1...b5
      • 2.Sc6#
  • Tries
    • 1.Bxc5+?
      • 1...Sxc5
        • 2.Qxc3#
      • 1...Kxc5!
    • 1.Rxd6+?
      • 1...Sd5
        • 2.Rd3#
        • 2.Rxd5#
      • 1...cxd6!
  • Keys
    • 1.Kxb7!
      • threat
        • 2.Sc6#
      • 1...Qxb3+
        • 2.Sdxb3#
        • 2.Saxb3#
      • 1...Bxf3+
        • 2.Sxf3#
      • 1...Sb6
        • 2.Qxc3#
      • 1...Sd5
        • 2.Rd3#
      • 1...c6
        • 2.Sxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 10
  • Sets
    • B(b);XR(E)::S(B),XB(b)
    • S(d);N_GUARD::QAB1(D),XP(c)
    • S(d);N_GUARD,N_SPINR(g),P_SPINR(i)::QAB1(D),XP(c)
    • S(f);N_GUARD::R1(E)
    • S(f);N_GUARD::R1(E),XS(f)
    • P(c);OGATE,XS(B)::QAB1(D)
    • P(j);N_GUARD::S(G)
  • Tries
    • Try
      • B(H);CHECK,P_PINR(i),XR(g)
      • Vars
        • S(d);SBLOCK,XB(H)::QAB1(D),XP(c)
      • Refutation
        • K(e);N_SPINR(i),S_FLIGHT,XB(H)
    • Try
      • R(I);CHECK,XR(i)
      • Refutation
        • P(k);XR(I)
  • Actual
    • K(J);P-FLIGHT,P_SPINQ(D),P_SPINR(E),XP(j)
    • Threat
      • S(G)
    • Vars
      • B(b);CHECK,XR(E)::S(B),XB(b)
      • S(d);N_PINQ(D),N_SPINR(g),P_SPINR(i)::QAB1(D),XP(c)
      • S(f);N_PINR(E)::R1(E)
      • P(k);N_PINR(E)::S(G),XP(k)
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