MESON Chess Problem Database

Problem Display
PID: 158028 (4rn2/Q7/n1bNR1P1/2Pk1p2/q4r2/1P3P2/1B1N3p/3R3K w - - 0 1)

Ahues, Herbert Siegfried Oskar

Schweizerische Arbeiter Schachzeitung, 1958

4rn2/Q7/n1bNR1P1/2Pk1p2/q4r2/1P3P2/1B1N3p/3R3K

#2

11 + 9

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe6
      • 2.Qf7#
    • 1...Ra8
      • 2.Re5#
    • 1...Rb8
      • 2.Re5#
    • 1...Rc8
      • 2.Re5#
    • 1...Rd8
      • 2.Re5#
  • Tries
    • 1.S2c4+?
      • 1...Kxe6
        • 2.Qf7#
      • 1...Rd4!
    • 1.S2e4+?
      • 1...Kxe6
        • 2.Sg5#
        • 2.Qf7#
      • 1...Qd4!
    • 1.S6e4?
      • threat
        • 2.Rd6#
      • 1...Kxe6
        • 2.Qf7#
      • 1...Rxe6
        • 2.Sc4#
      • 1...Sxe6
        • 2.Sf6#
      • 1...Rd8
        • 2.Re5#
      • 1...Qd4!
  • Keys
    • 1.S6c4!
      • threat
        • 2.Rd6#
      • 1...Kxe6
        • 2.Qf7#
      • 1...Rxe6
        • 2.Se4#
      • 1...Sxe6
        • 2.Se3#
      • 1...Rd8
        • 2.Re5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • K(d);OGATEB,P_PINP(F),S_FLIGHT,XR(I)::QAB1(K)
    • R(h);N_GUARD::R1(I)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(d);P_PINP(F),S_FLIGHT,XR(I)::QAB1(K)
      • Refutation
        • R(c);P_SPINR(c)
    • Try
      • S(D);CHECK
      • Refutation
        • Q(b);P_SPINQ(b)
    • Try
      • S(H);
      • Threat
        • R1(I)
      • Vars
        • K(d);OGATEB,S_FLIGHT,XR(I)::QAB1(K)
        • R(h);SBLOCK,XR(I)::R(A)+S(D)
        • S(i);SBLOCK,XR(I)::S(H)
        • R(h);N_GUARD::R1(I)
      • Refutation
        • Q(b);
  • Actual
    • S(H);
    • Threat
      • R1(I)
    • Vars
      • K(d);OGATEB,P_PINP(F),S_FLIGHT,XR(I)::QAB1(K)
      • R(h);SBLOCK,XR(I)::R(A)+S(D)
      • S(i);SBLOCK,XR(I)::S(H)
      • R(h);N_GUARD::R1(I)
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