MESON Chess Problem Database

Problem Display
PID: 214267 (B2N4/8/K1Q1pr2/2p4r/2NknbRq/8/2RpPn2/6Bb w - - 0 1)

Schirdewan, Ulrich

Suomen Shakki, 1933

B2N4/8/K1Q1pr2/2p4r/2NknbRq/8/2RpPn2/6Bb

#2

9 + 11

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rf5
      • 2.Sxe6#
    • 1...Rf7
      • 2.Sxe6#
    • 1...Rf8
      • 2.Sxe6#
    • 1...Bg5
      • 2.Qd7#
      • 2.Qd6#
    • 1...Sg3
      • 2.Bxf2#
  • Tries
    • 1.Qd5+?
      • 1...Rxd5
        • 2.Sc6#
      • 1...exd5+!
  • Keys
    • 1.Qxe6!
      • threat
        • 2.Sc6#
      • 1...Rxe6+
        • 2.Sxe6#
      • 1...Sc3
        • 2.Rxd2#
      • 1...Sg3
        • 2.Bxf2#
      • 1...Sg5
        • 2.Qxf6#
      • 1...Sd6
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • R(k);N_GUARD::S(I),XP(j)
    • S(e);N_GUARD,P_SPINB(f),S_CUTQ(g)::B(A),XS(c)
  • Tries
    • Try
      • Q(G);CHECK
      • Vars
        • R(i);SBLOCK,XQ(G)::S(I)
      • Refutation
        • P(j);CHECK,XQ(G)
  • Actual
    • Q(G);P_SPINQ(G),XP(j)
    • Threat
      • S(I)
    • Vars
      • R(k);CHECK,XQ(G)::S(I),XR(k)
      • S(e);N_GUARD,P_SPINB(f),SBLOCK::R(B),XP(b)
      • S(e);N_GUARD,P_SPINB(f),S_CUTQ(g)::B(A),XS(c)
      • S(e);N_GUARD,P_SPINB(f),S_CUTQ(g),S_CUTR(i)::QAB(G),XR(k)
      • S(e);N_PINQ(G),P_SPINB(f)::QAB1(G)
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Developed and maintained by Brian Stephenson.
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