MESON Chess Problem Database

Problem Display
PID: 90541 (4r3/6p1/7B/7B/b2Qn3/2p1p3/1p2N1K1/4k3 w - - 0 1)

Ahlheim, Karl-Heinz

Die Schwalbe, 1968

4r3/6p1/7B/7B/b2Qn3/2p1p3/1p2N1K1/4k3

#2

5 + 8

6490 yacpdb 2009
15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Tries
    • 1.Sg3?
      • threat
        • 2.Qxe3#
      • 1...Sxg3
        • 2.Qxc3#
      • 1...Bd1
        • 2.Qxd1#
      • 1...Bb5
        • 2.Qd1#
      • 1...Sf2
        • 2.Qxc3#
      • 1...Sc5
        • 2.Qxc3#
      • 1...Sg5
        • 2.Qxc3#
      • 1...Sd6
        • 2.Qxc3#
      • 1...Sf6
        • 2.Qxc3#
      • 1...e2
        • 2.Qg1#
      • 1...Sd2!
    • 1.Sf4?
      • threat
        • 2.Qxe3#
      • 1...Bd1
        • 2.Qxd1#
      • 1...Bb5
        • 2.Qd1#
      • 1...Sd2
        • 2.Sd3#
      • 1...Sf2
        • 2.Qxc3#
      • 1...Sg3
        • 2.Qxc3#
      • 1...Sc5
        • 2.Qxc3#
      • 1...Sg5
        • 2.Qxc3#
      • 1...Sd6
        • 2.Qxc3#
      • 1...Sf6
        • 2.Qxc3#
      • 1...e2!
  • Keys
    • 1.Sg1!
      • threat
        • 2.Qxe3#
      • 1...Bd1
        • 2.Qxd1#
      • 1...Bb5
        • 2.Qd1#
      • 1...Sd2
        • 2.Qh4#
      • 1...Sf2
        • 2.Qxc3#
      • 1...Sg3
        • 2.Qxc3#
      • 1...Sc5
        • 2.Qxc3#
      • 1...Sg5
        • 2.Qxc3#
      • 1...Sd6
        • 2.Qxc3#
      • 1...Sf6
        • 2.Qxc3#
      • 1...e2
        • 2.Sf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(A);
      • Threat
        • QAR2(C),XP(d)
      • Vars
        • S(f);N_GUARD,XS(A)::QAB(C),XP(c)
        • B(e);N_GUARD::QAR1(C),XB(e)
        • B(e);N_GUARD::QAR1(C)
        • S(f);N_GUARD::QAB(C),XP(c)
        • P(d);OGATE::QAR2(C)
      • Refutation
        • S(f);
    • Try
      • S(A);
      • Threat
        • QAR2(C),XP(d)
      • Vars
        • B(e);N_GUARD::QAR1(C),XB(e)
        • B(e);N_GUARD::QAR1(C)
        • S(f);SBLOCK::S(A)
        • S(f);N_GUARD::QAB(C),XP(c)
      • Refutation
        • P(d);
  • Actual
    • S(A);
    • Threat
      • QAR2(C),XP(d)
    • Vars
      • B(e);N_GUARD::QAR1(C),XB(e)
      • B(e);N_GUARD::QAR1(C)
      • S(f);OGATE,SBLOCK::QAB(C)
      • S(f);N_GUARD::QAB(C),XP(c)
      • P(d);SBLOCK::S(A)
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