MESON Chess Problem Database

Problem Display
PID: 3155 (8/2p1pN2/K1P1kp1p/R3b2Q/2R1P1N1/1B1r3B/1p3rpp/5b2 w - - 0 1)

Harder, Karl

Source?, 1926

8/2p1pN2/K1P1kp1p/R3b2Q/2R1P1N1/1B1r3B/1p3rpp/5b2

#2

10 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Rf5
      • 2.exf5#
    • 1...Rd5
      • 2.exd5#
    • 1...Bc3
      • 2.Rd4#
    • 1...Bd4
      • 2.Rc3#
      • 2.Qd5#
    • 1...Bd6
      • 2.Sd8#
    • 1...f5
      • 2.Rxe5#
  • Tries
    • 1.Sxf2+?
      • 1...f5
        • 2.Qxf5#
      • 1...Rxh3!
    • 1.Se3+?
      • 1...Rf5
        • 2.Bxf5#
        • 2.exf5#
      • 1...f5!
    • 1.Sgxe5+?
      • 1...Rf5
        • 2.Bxf5#
        • 2.Qxf5#
        • 2.exf5#
      • 1...f5
        • 2.Qg6#
        • 2.Qxh6#
      • 1...Rxh3!
  • Keys
    • 1.Qg6!
      • threat
        • 2.Rxe5#
      • 1...Rf5
        • 2.exf5#
      • 1...Rd5
        • 2.Sxf2#
        • 2.exd5#
      • 1...Bc3
        • 2.Rd4#
      • 1...Bg3
        • 2.Sxf2#
      • 1...Bd4
        • 2.Rc3#
      • 1...Bf4
        • 2.Se3#
      • 1...Bd6
        • 2.Sd8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • R(c);OGATE::P(D),XR(c)
    • R(f);OGATE,P_PINR(C)::P(D),XR(f)
    • B(g);S_CUTR(f)::B(A)+R(C)
    • B(g);SBLOCK,S_CUTR(f)::S(J)
    • P(i);N_GUARD::R1(F),XB(g)
  • Tries
    • Try
      • S(E);CHECK,XR(c)
      • Vars
        • P(i);P_SPINP(i)::QAB1(G),XP(i)
      • Refutation
        • R(f);P_PINR(C),XB(B)
    • Try
      • S(E);CHECK
      • Refutation
        • P(i);P_SPINP(i)
    • Try
      • S(E);CHECK,XB(g)
      • Refutation
        • R(f);P_PINR(C),XB(B)
  • Actual
    • Q(G);P_PINP(i)
    • Threat
      • R1(F),XB(g)
    • Vars
      • R(c);OGATE::P(D),XR(c)
      • B(g);S_CUTR(f)::B(A)+R(C)
      • B(g);S_CUTR(f)::B(B)+S(E),XR(c)
      • B(g);S_CUTR(c)::B(B)+S(E)
      • B(g);SBLOCK,S_CUTR(f)::S(J)
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Developed and maintained by Brian Stephenson.
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