MESON Chess Problem Database

Problem Display
PID: 211115 (K3N3/nQb4q/4p3/4k1p1/R2N2p1/4Pn2/B6r/5R2 w - - 0 1)

Vitense, Johannes

Deutsche Schachblatter, 1942

K3N3/nQb4q/4p3/4k1p1/R2N2p1/4Pn2/B6r/5R2

#2

8 + 9

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sxd4
      • 2.exd4#
  • Tries
    • 1.Sxf3+?
      • 1...Kf5
        • 2.Qe4#
      • 1...gxf3!
    • 1.Sc6+?
      • 1...Sxc6
        • 2.Qb5#
      • 1...Kf5!
    • 1.Ra5+?
      • 1...Sb5
        • 2.Rxb5#
      • 1...Bxa5!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Qe4#
      • 1...Kxf5
        • 2.Qe4#
      • 1...Qxf5
        • 2.Qxc7#
      • 1...exf5
        • 2.Qd5#
      • 1...Sd2
        • 2.Qb2#
      • 1...Sd4
        • 2.exd4#
      • 1...Sc6
        • 2.Qb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(b);OGATE,XS(E)::P(C),XS(b)
  • Tries
    • Try
      • S(E);CHECK,XS(b)
      • Vars
        • K(d);P-FLIGHT::QAB1(F)
      • Refutation
        • P(c);XS(E)
    • Try
      • S(E);CHECK
      • Vars
        • S(g);XS(E)::QAR(F)
      • Refutation
        • K(d);P-FLIGHT,P_SPINS(b)
    • Try
      • R(D);CHECK
      • Vars
        • S(g);N_GUARD,P_SPINS(g)::R(D),XS(g)
      • Refutation
        • B(h);XR(D)
  • Actual
    • S(E);
    • Threat
      • QAR1(F)
    • Vars
      • K(d);P-FLIGHT,P_SPINS(b),XS(E)::QAB1(F)
      • Q(i);N_GUARD,SBLOCK,XS(E)::QAB(F),XB(h)
      • P(f);N_GUARD,SBLOCK,XS(E)::QAR1(F)
      • S(b);N_GUARD,S_CUTR(a)::QAB(F)
      • S(b);OGATE::P(C),XS(b)
      • S(g);N_GUARD::QAR(F)
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Developed and maintained by Brian Stephenson.
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