MESON Chess Problem Database

Problem Display
PID: 275973 (1B3N2/2r1p2K/6p1/4kp2/p1P1N2p/q1P5/5Q2/4R3 w - - 0 1)

Meurs, Abraham

Die Schwalbe, 1933

1B3N2/2r1p2K/6p1/4kp2/p1P1N2p/q1P5/5Q2/4R3

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qc1
      • 2.Bxc7#
    • 1...Qb2
      • 2.Bxc7#
    • 1...Qa1
      • 2.Bxc7#
    • 1...Qa2
      • 2.Bxc7#
    • 1...Qb3
      • 2.Bxc7#
    • 1...Qxc3
      • 2.Bxc7#
    • 1...e6+
      • 2.Sd7#
  • Tries
    • 1.Sd2+?
      • 1...Kd6
        • 2.Re6#
        • 2.Qb6#
      • 1...Kf6!
    • 1.Sg3+?
      • 1...Kd6
        • 2.Re6#
        • 2.Qb6#
      • 1...Kf6!
    • 1.Sc5+?
      • 1...Kd6
        • 2.Re6#
      • 1...Kf6!
    • 1.Sg5+?
      • 1...Kd6
        • 2.Re6#
        • 2.Qb6#
      • 1...Kf6!
    • 1.Sd6+?
      • 1...Kxd6
        • 2.Re6#
        • 2.Qb6#
      • 1...Kf6!
    • 1.Sf6+?
      • 1...Kd6
        • 2.Re6#
        • 2.Qb6#
      • 1...Kxf6!
    • 1.Qg3+?
      • 1...f4
        • 2.Qg5#
      • 1...hxg3!
  • Keys
    • 1.Kxg6!
      • threat
        • 2.Qxf5#
      • 1...Qd6+
        • 2.Sf6#
      • 1...Qxc3
        • 2.Bxc7#
      • 1...fxe4
        • 2.Qh2#
      • 1...f4
        • 2.Qd4#
      • 1...e6
        • 2.Sd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • Q(a);N_GUARD::B(G),XR(g)
    • Q(a);N_GUARD,XP(C)::B(G),XR(g)
    • P(h);CHECK,SBLOCK::S(H)
  • Tries
    • Try
      • S(E);CHECK
      • Refutation
        • K(d);N_SPINR(g),P_SPINP(e),S_FLIGHT
    • Try
      • S(E);CHECK
      • Refutation
        • K(d);N_SPINR(g),P_SPINP(e),S_FLIGHT
    • Try
      • S(E);CHECK
      • Vars
        • K(d);OGATE,S_FLIGHT::R1(A)
      • Refutation
        • K(d);N_SPINR(g),P_SPINP(e),S_FLIGHT
    • Try
      • S(E);CHECK
      • Refutation
        • K(d);N_SPINR(g),P_SPINP(e),S_FLIGHT
    • Try
      • S(E);CHECK,N_PINR(g)
      • Refutation
        • K(d);P_SPINP(e),S_FLIGHT
    • Try
      • S(E);CHECK
      • Refutation
        • K(d);N_SPINR(g),P_SPINP(e),S_FLIGHT,XS(E)
    • Try
      • Q(B);CHECK
      • Vars
        • P(e);OGATEB,P_SPINP(e)::QAR2(B)
      • Refutation
        • P(c);XQ(B)
  • Actual
    • K(F);S_FLIGHT,XP(f)
    • Threat
      • QAR1(B),XP(e)
    • Vars
      • Q(a);CHECK,N_SPINR(g),SBLOCK::R(A)+S(E)
      • Q(a);N_GUARD,XP(C)::B(G),XR(g)
      • P(e);N_GUARD,P_SPINP(e),XS(E)::QAB(B)
      • P(e);SBLOCK::QAB1(B)
      • P(h);SBLOCK::S(H)
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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).