MESON Chess Problem Database

Problem Display
PID: 135514 (R1K5/Bp6/8/kPR1P3/p2p1Q2/2Prr3/4B3/8 w - - 0 1)

Ancin, Andrej

Die Schwalbe, 1938

R1K5/Bp6/8/kPR1P3/p2p1Q2/2Prr3/4B3/8

#2

9 + 6

14649 Andrej Ancin - Chess Compositions 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Rd1
      • 2.b6#
    • 1...Rd2
      • 2.b6#
    • 1...b6
      • 2.Bb8#
  • Tries
    • 1.Kxb7?
      • threat
        • 2.Bb6#
        • 2.Bb8#
        • 2.b6#
      • 1...Rxe5
        • 2.Bb6#
        • 2.Bb8#
      • 1...a3
        • 2.Bb6#
        • 2.Bb8#
      • 1...Rxc3!
    • 1.Kc7?
      • threat
        • 2.Bb6#
        • 2.Bb8#
      • 1...b6
        • 2.Bxb6#
        • 2.Bb8#
      • 1...Rxc3!
  • Keys
    • 1.Rd5!
      • threat
        • 2.Bxd4#
      • 1...Rxc3+
        • 2.Bc5#
      • 1...dxc3
        • 2.Bxe3#
      • 1...b6
        • 2.Bb8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(a);::R(E)+P(D)
    • P(f);SBLOCK::R(H)+B(G)
  • Tries
    • Try
      • K(I);S_FLIGHT,XP(f)
      • Threat
        • DUALS(3)
      • Refutation
        • R(a);XP(B)
    • Try
      • K(I);P-FLIGHT
      • Threat
        • DUALS(2)
      • Refutation
        • R(a);P_PINR(E),XP(B)
  • Actual
    • R(E);
    • Threat
      • R(H)+B(G),XP(d)
    • Vars
      • R(a);CHECK,XP(B)::R(H)+B(G)
      • P(d);OGATE,XP(B)::R(H)+B(G),XR(b)
      • P(f);SBLOCK::R(H)+B(G)
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