MESON Chess Problem Database

Problem Display
PID: 82355 (5b2/3B1N1K/5p1B/R5Pk/4p2p/3p3p/p2qR1rP/3Q4 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Rochade Europa, 1995

5b2/3B1N1K/5p1B/R5Pk/4p2p/3p3p/p2qR1rP/3Q4

#2

9 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qc3
      • 2.Rxg2#
    • 1...Qb4
      • 2.Rxg2#
    • 1...Qxa5
      • 2.Rxg2#
    • 1...Qxg5
      • 2.Rxg2#
    • 1...Rxg5
      • 2.Rxd2#
  • Tries
    • 1.Bg4+?
      • 1...Kxg4
        • 2.Rxe4#
      • 1...Rxg4!
    • 1.Rxd2+?
      • 1...Rg4
        • 2.Bxg4#
        • 2.Qxg4#
      • 1...Re2!
    • 1.gxf6+?
      • 1...Qxa5
        • 2.Rxg2#
      • 1...Qg5
        • 2.Rxg2#
      • 1...Rg5
        • 2.Rxd2#
      • 1...Bc5!
  • Keys
    • 1.Be8!
      • threat
        • 2.Se5#
      • 1...Kg4
        • 2.Rxe4#
      • 1...Qxg5
        • 2.Rxg2#
      • 1...Rxg5
        • 2.Rxd2#
      • 1...Bxh6
        • 2.Sxh6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • Q(b);N_GUARD::QAB(A)+R(B),XR(c)
    • Q(b);N_GUARD,SBLOCK,XR(D)::QAB(A)+R(B),XR(c)
    • Q(b);N_GUARD,P_SPINQ(b),XP(E)::QAB(A)+R(B),XR(c)
    • R(c);N_GUARD,P_SPINR(c),XP(E)::QAB(A)+R(B),XQ(b)
  • Tries
    • Try
      • B(G);CHECK
      • Vars
        • K(h);S_FLIGHT,XB(G)::QAB(A)+R(B),DCHECK,XP(f)
      • Refutation
        • R(c);XB(G)
    • Try
      • R(B);CHECK,XQ(b)
      • Refutation
        • R(c);P_SPINR(c)
    • Try
      • P(E);CHECK,XP(i)
      • Vars
        • Q(b);SBLOCK,XR(D)::QAB(A)+R(B),XR(c)
        • Q(b);P_SPINQ(b)::QAB(A)+R(B),XR(c)
        • R(c);P_SPINR(c)::QAB(A)+R(B),XQ(b)
      • Refutation
        • B(j);P_SPINB(j)
  • Actual
    • B(G);
    • Threat
      • B(G)+S(H)
    • Vars
      • K(h);S_FLIGHT::QAB(A)+R(B),DCHECK,XP(f)
      • Q(b);N_GUARD,P_SPINQ(b),XP(E)::QAB(A)+R(B),XR(c)
      • R(c);N_GUARD,P_SPINR(c),XP(E)::QAB(A)+R(B),XQ(b)
      • B(j);XB(F)::B(G)+S(H),XB(j)
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Developed and maintained by Brian Stephenson.
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