MESON Chess Problem Database

Problem Display
PID: 226680 (4KB1b/nB6/pp6/1k2n1Q1/3P1p2/R1p2r2/1N2Nq2/4r3 w - - 0 1)

Daniel, Arthur William

Sunday Chronicle, 1945

(First published on Sun Oct 7 1945)

4KB1b/nB6/pp6/1k2n1Q1/3P1p2/R1p2r2/1N2Nq2/4r3

#2

8 + 11

15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd4
      • 2.Sxd4#
    • 1...Sc6
      • 2.Bxa6#
    • 1...a5
      • 2.Rb3#
  • Tries
    • 1.Qf6?
      • threat
        • 2.Bxa6#
      • 1...a5
        • 2.Rb3#
      • 1...Bxf6!
    • 1.Qg8?
      • threat
        • 2.Qb3#
        • 2.Qd5#
      • 1...Qxd4
        • 2.Sxd4#
      • 1...cxb2
        • 2.Qd5#
      • 1...Sd3
        • 2.Qc4#
      • 1...Sc4
        • 2.Qxc4#
        • 2.Qd5#
      • 1...Sec6
        • 2.Bxa6#
        • 2.Qc4#
        • 2.Qd5#
      • 1...Sd7
        • 2.Qb3#
        • 2.Qc4#
      • 1...Sac6
        • 2.Bxa6#
        • 2.Qd5#
      • 1...c2
        • 2.Qd5#
      • 1...Sf7!
    • 1.d5?
      • threat
        • 2.Bxa6#
      • 1...a5
        • 2.Rb3#
      • 1...Qc5!
  • Keys
    • 1.Qe7!
      • threat
        • 2.Qb4#
      • 1...Qxd4
        • 2.Sxd4#
      • 1...Sd3
        • 2.Sxc3#
      • 1...Sec6
        • 2.Bxa6#
      • 1...Sac6
        • 2.Bxa6#
      • 1...a5
        • 2.Rb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(b);XP(D)::S(B),XQ(b)
    • S(j);SBLOCK::B(F),XP(h)
    • P(h);SBLOCK::R(C)
  • Tries
    • Try
      • Q(E);N_PINS(g)
      • Threat
        • B(F),XP(h)
      • Vars
        • P(h);SBLOCK::R(C)
      • Refutation
        • B(k);XQ(E)
    • Try
      • Q(E);N_PINS(g)
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);XP(D)::S(B),XQ(b)
        • P(c);XS(A)::QAR2(E)
        • S(g);N_GUARD,P_PINS(B)::QAB1(E)
        • P(c);::QAR2(E)
      • Refutation
        • S(g);P_PINS(B)
    • Try
      • P(D);N_PINS(g)
      • Threat
        • B(F),XP(h)
      • Vars
        • P(h);SBLOCK::R(C)
      • Refutation
        • Q(b);
  • Actual
    • Q(E);N_PINS(g)
    • Threat
      • QAR1(E)
    • Vars
      • Q(b);XP(D)::S(B),XQ(b)
      • S(g);S_CUTR(d)::S(B),XP(c)
      • S(g);SBLOCK::B(F),XP(h)
      • S(j);SBLOCK::B(F),XP(h)
      • P(h);SBLOCK::R(C)
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