MESON Chess Problem Database

Problem Display
PID: 257924 (N5b1/1prpQ1Kp/kB3p2/2P3p1/Bp4q1/3N4/R6b/8 w - - 0 1)

Andrade, Barry Jack da Costa

British Chess Magazine, 1934

N5b1/1prpQ1Kp/kB3p2/2P3p1/Bp4q1/3N4/R6b/8

#2

8 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qd1
      • 2.Sxb4#
    • 1...Qe2
      • 2.Sxb4#
    • 1...Qf3
      • 2.Sxb4#
    • 1...Qh3
      • 2.Sxb4#
    • 1...Qf5
      • 2.Sxb4#
    • 1...Qh5
      • 2.Sxb4#
    • 1...Qe6
      • 2.Sxb4#
    • 1...Qg1
      • 2.Sxb4#
    • 1...Qg2
      • 2.Sxb4#
    • 1...Qg3
      • 2.Sxb4#
    • 1...Rxc5
      • 2.Sxc5#
    • 1...Bg1
      • 2.Sxc7#
    • 1...Bf4
      • 2.Sxb4#
    • 1...Bc4
      • 2.Sxb4#
    • 1...d5
      • 2.Bc6#
      • 2.Bd7#
      • 2.Be8#
    • 1...d6
      • 2.Sxc7#
  • Tries
    • 1.Qe4?
      • threat
        • 2.Sxb4#
      • 1...d5+
        • 2.Bd7#
      • 1...d6+
        • 2.Sxc7#
      • 1...b3
        • 2.Sb4#
      • 1...Qxe4!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Sxb4#
      • 1...d5+
        • 2.Bd7#
      • 1...d6+
        • 2.Sxc7#
      • 1...b3
        • 2.Sb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 14
  • Sets
    • Q(c);N_GUARD::S(B),XP(b)
    • Q(c);N_GUARD,SBLOCK::S(B),XP(b)
    • R(h);XP(D)::S(B),XR(h)
    • B(a);N_GUARD::S(H),XR(h)
    • B(a);S_CUTQ(c)::S(B),XP(b)
    • B(k);S_CUTQ(c)::S(B),XP(b)
    • P(i);P_PINQ(F),S_CUTB(a)::S(H),XR(h)
  • Tries
    • Try
      • Q(F);
      • Threat
        • S(B),XP(b)
      • Vars
        • P(i);CHECK,S_CUTB(k)::R(A)+B(C)
        • P(i);CHECK,S_CUTB(a)::S(H),XR(h)
        • P(b);::S(B)
      • Refutation
        • Q(c);XQ(F)
  • Actual
    • Q(F);
    • Threat
      • QAB(F)+S(B),DCHECK,XP(b)
    • Vars
      • P(i);CHECK,S_CUTB(k)::R(A)+B(C)
      • P(i);CHECK,S_CUTB(a)::S(H),XR(h)
      • P(b);::QAB(F)+S(B),DCHECK
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