MESON Chess Problem Database

Problem Display
PID: 135349 (q2rn3/2p1N3/6N1/2p2Rp1/2n1k3/2r1BRKb/1QP5/7B w - - 0 1)

Laib, Kurt Friedrich

Die Schwalbe, 1934

q2rn3/2p1N3/6N1/2p2Rp1/2n1k3/2r1BRKb/1QP5/7B

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Sxb2
      • 2.Re5#
    • 1...Sd2
      • 2.Re5#
    • 1...Sa3
      • 2.Re5#
    • 1...Sxe3
      • 2.R3f4#
    • 1...Sa5
      • 2.Re5#
    • 1...Se5
      • 2.Rxe5#
    • 1...Sb6
      • 2.Re5#
    • 1...Scd6
      • 2.Re5#
    • 1...g4
      • 2.R5f4#
  • Tries
    • 1.Qxc3?
      • threat
        • 2.R3f4#
      • 1...Rd3
        • 2.Qxd3#
        • 2.cxd3#
      • 1...Bg2!
  • Keys
    • 1.Bxg5!
      • threat
        • 2.Rf4#
      • 1...Rxf3+
        • 2.Bxf3#
      • 1...Kd4
        • 2.Rd3#
      • 1...Bxf5
        • 2.Rd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 9
  • Sets
    • S(c);N_GUARD,XQ(B)::R1(G)
    • S(c);N_GUARD::R1(G)
    • S(c);SBLOCK,XB(D)::B(A)+R(E),DCHECK
    • S(c);N_GUARD::R1(G),XS(c)
    • P(f);N_GUARD::R1(G)
  • Tries
    • Try
      • Q(B);XR(a)
      • Threat
        • B(A)+R(E),DCHECK
      • Refutation
        • B(b);
  • Actual
    • B(D);P_SPINR(E),XP(f)
    • Threat
      • R1(G)
    • Vars
      • R(a);CHECK,OGATE,P_SPINR(a),XR(E)::B(A),XR(a)
      • K(d);P-FLIGHT,P_SPINR(a)::R1(E)
      • B(b);N_GUARD,XR(G)::B(A)+R(E)
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