MESON Chess Problem Database

Problem Display
PID: 260980 (n7/2p5/1pK5/1P2p3/QPNpR3/2k2P2/1N6/8 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Neue Zurcher Zeitung, 1975

n7/2p5/1pK5/1P2p3/QPNpR3/2k2P2/1N6/8

#2

8 + 6

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...d3
      • 2.Sd1#
  • Tries
    • 1.Sd1+?
      • 1...Kd3
        • 2.Qb3#
      • 1...Kxc4!
    • 1.Re3+?
      • 1...d3
        • 2.Rxd3#
      • 1...dxe3!
    • 1.Rg4?
      • 1...d3
        • 2.Sd1#
      • 1...e4!
    • 1.Rh4?
      • 1...d3
        • 2.Sd1#
      • 1...e4!
    • 1.Qc2+?
      • 1...Kxb4
        • 2.Sd3#
      • 1...Kxc2!
    • 1.f4?
      • 1...d3
        • 2.Sd1#
      • 1...exf4!
  • Keys
    • 1.Sd3!
      • 1...Kxd3
        • 2.Qb3#
      • 1...Kxc4
        • 2.Qc2#

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • P(b);SBLOCK::S(A)
  • Tries
    • Try
      • S(A);CHECK
      • Vars
        • K(a);N_GUARD,P-FLIGHT::QAR2(C)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(b),XS(E)
    • Try
      • R(F);CHECK
      • Vars
        • P(b);P_SPINP(b)::R1(F),XP(b)
      • Refutation
        • P(b);XR(F)
    • Try
      • R(F);
      • Vars
        • P(b);SBLOCK::S(A)
      • Refutation
        • P(c);
    • Try
      • R(F);
      • Vars
        • P(b);SBLOCK::S(A)
      • Refutation
        • P(c);
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT,XP(D)::S(A)
      • Refutation
        • K(a);P-FLIGHT,XQ(C)
    • Try
      • P(B);
      • Vars
        • P(b);SBLOCK::S(A)
      • Refutation
        • P(c);XP(B)
  • Actual
    • S(A);
    • Vars
      • K(a);N_GUARD,P-FLIGHT,XS(A)::QAR2(C)
      • K(a);N_GUARD,P-FLIGHT,P_SPINP(b),XS(E)::QAR2(C)
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