MESON Chess Problem Database

Problem Display
PID: 257965 (2qb4/1b1pp1P1/rr5p/7p/5Q1p/2p1P3/5NkN/1nKR2B1 w - - 0 1)

Andrade, Barry Jack da Costa

British Chess Magazine, 1934

2qb4/1b1pp1P1/rr5p/7p/5Q1p/2p1P3/5NkN/1nKR2B1

#2

8 + 13

3713 Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rc6
      • 2.Qf3#
    • 1...Bf3
      • 2.Qxf3#
    • 1...Bc6
      • 2.g8Q#
      • 2.g8R#
    • 1...d5
      • 2.Qf3#
  • Tries
    • 1.Qe4+?
      • 1...Kg3
        • 2.Sf1#
      • 1...Bxe4!
  • Keys
    • 1.Qf5!
      • threat
        • 2.Qh3#
      • 1...Kg3
        • 2.Qh3#
      • 1...h3
        • 2.Qxh3#
      • 1...d5
        • 2.Qf3#
      • 1...d6
        • 2.g8Q#
        • 2.g8R#

This anticipates 114822(1956)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(g);S_CUTB(i)::QAB1(G)
    • B(i);N_GUARD::QAB1(G),XB(i)
    • B(i);S_CUTR(g)::P=Q
    • P(j);S_CUTB(i)::QAB1(G)
  • Tries
    • Try
      • Q(G);CHECK
      • Vars
        • K(b);N_GUARD,P-FLIGHT,S_CUTB(i)::S(E)
      • Refutation
        • B(i);XQ(G)
  • Actual
    • Q(G);
    • Threat
      • QAB1(G)
    • Vars
      • K(b);P-FLIGHT::QAR1(G)
      • P(d);::QAB1(G),XP(d)
      • P(j);S_CUTB(i)::QAB1(G)
      • P(j);S_CUTR(g)::P=Q
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