MESON Chess Problem Database

Problem Display
PID: 157409 (6bB/8/1N1R1K2/2pP2p1/3kPR1n/2n5/1Qp4r/5N2 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Die Schwalbe, 1956

6bB/8/1N1R1K2/2pP2p1/3kPR1n/2n5/1Qp4r/5N2

#2

9 + 8

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd5
      • 2.Rxd5#
    • 1...Be6
      • 2.dxe6#
  • Tries
    • 1.Qb4+?
      • 1...Kd3
        • 2.Qc4#
      • 1...c4
        • 2.Qxc4#
      • 1...cxb4!
    • 1.Qb5?
      • threat
        • 2.Kxg5#
        • 2.Ke7#
        • 2.Qc4#
      • 1...Sxe4+
        • 2.Ke7#
      • 1...Sxd5+
        • 2.Kxg5#
      • 1...gxf4
        • 2.Qc4#
      • 1...c4
        • 2.Qxc4#
      • 1...Rg2
        • 2.Ke7#
        • 2.Qc4#
      • 1...Sg2
        • 2.Qc4#
      • 1...Sf3
        • 2.Qc4#
      • 1...Sf5
        • 2.Qc4#
      • 1...Sg6
        • 2.Qc4#
      • 1...g4
        • 2.Kg5#
        • 2.Ke7#
        • 2.Qc4#
      • 1...Sxb5!
  • Keys
    • 1.Qb3!
      • threat
        • 2.Qc4#
      • 1...Sxe4+
        • 2.Ke7#
      • 1...Sxd5+
        • 2.Kxg5#
      • 1...Kd3
        • 2.Qc4#
      • 1...c4
        • 2.Qxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • B(h);OGATE,P_SPINB(h),XP(E)::R1(G),XB(h)
    • B(h);OGATE::R(G)+P(E),XB(h)
  • Tries
    • Try
      • Q(B);CHECK,N_PINS(c)
      • Vars
        • K(d);P-FLIGHT::QAB1(B)
        • P(f);P_SPINP(f)::QAR1(B),XP(f)
      • Refutation
        • P(f);XQ(B)
    • Try
      • Q(B);N_PINS(c)
      • Threat
        • DUALS(3)
      • Vars
        • S(c);CHECK,P_SPINS(c),XP(C)::B(I)+K(H)
        • S(c);CHECK,P_SPINS(c),XP(E)::B(I)+K(H),XP(g)
        • P(g);XR(D)::QAR1(B)
        • P(f);::QAR1(B),XP(f)
        • S(e);::QAR1(B)
      • Refutation
        • S(c);XQ(B)
  • Actual
    • Q(B);N_PINS(c)
    • Threat
      • QAR1(B)
    • Vars
      • S(c);CHECK,P_SPINS(c),XP(C)::B(I)+K(H)
      • S(c);CHECK,P_SPINS(c),XP(E)::B(I)+K(H),XP(g)
      • K(d);P-FLIGHT,P_SPINS(c)::QAB1(B)
      • P(f);::QAR1(B),XP(f)
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