MESON Chess Problem Database

Problem Display
PID: 271281 (4b3/5n2/5K2/4p3/RP1pk2p/4N2P/2P3P1/B1N1Q3 w - - 0 1)

Schulz, Carl

Die Schwalbe, 1932

4b3/5n2/5K2/4p3/RP1pk2p/4N2P/2P3P1/B1N1Q3

#2

10 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Sd5#
    • 1...d3
      • 2.b5#
  • Tries
    • 1.Sd1+?
      • 1...Kf4
        • 2.Sd3#
        • 2.Qxh4#
      • 1...Kd5!
    • 1.Sf1+?
      • 1...Kf4
        • 2.Sd3#
        • 2.Qxh4#
      • 1...Kd5!
    • 1.Sc4+?
      • 1...Kf4
        • 2.Sd3#
        • 2.Qxh4#
      • 1...Kd5!
    • 1.Sg4+?
      • 1...Kf4
        • 2.Sd3#
      • 1...Kd5!
    • 1.Sf5+?
      • 1...Kf4
        • 2.Sd3#
        • 2.Qxh4#
      • 1...Kd5!
    • 1.Ra5?
      • threat
        • 2.Sd5#
      • 1...Kf4
        • 2.Sd5#
      • 1...dxe3
        • 2.Qxh4#
      • 1...Bb5!
    • 1.Qg3?
      • threat
        • 2.Qf3#
      • 1...Sg5
        • 2.Qxe5#
      • 1...hxg3!
    • 1.Qe2?
      • threat
        • 2.Qf3#
      • 1...Kf4
        • 2.Qf3#
      • 1...Sg5!
  • Keys
    • 1.c4!
      • threat
        • 2.Sd5#
      • 1...Kf4
        • 2.Sd5#
      • 1...dxe3
        • 2.Qxh4#
      • 1...dxc4 ep
        • 2.b5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(b);N_GUARD,P-FLIGHT::S(F)
    • P(a);::R(H)+P(I)
  • Tries
    • Try
      • S(F);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(F);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(F);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(F);CHECK
      • Vars
        • K(b);N_GUARD,P-FLIGHT::S(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(F);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(H);
      • Threat
        • QAR(C)+S(F)
      • Vars
        • K(b);P-FLIGHT::S(F)
        • P(a);P_SPINP(a),SBLOCK,XS(F)::QAR(C),XP(c)
      • Refutation
        • B(f);
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • S(e);N_GUARD::QAR1(C),XP(d)
      • Refutation
        • P(c);XQ(C)
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • K(b);P-FLIGHT::QAR1(C)
      • Refutation
        • S(e);
  • Actual
    • P(D);
    • Threat
      • QAR(C)+S(F)
    • Vars
      • K(b);P-FLIGHT::S(F)
      • P(a);P_SPINP(a),SBLOCK,XS(F)::QAR(C),XP(c)
      • P(a);EP,XP(D)::R(H)+P(I)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).