MESON Chess Problem Database

Problem Display
PID: 10774 (3r4/1p1R4/1p4pp/1p5q/1bk1NN1R/P4r2/5p2/3Q1K2 w - - 0 1)

Haring, Jacobus

Die Schwalbe, 1968

3r4/1p1R4/1p4pp/1p5q/1bk1NN1R/P4r2/5p2/3Q1K2

#2

7 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qg4
      • 2.Qd5#
    • 1...Qxh4
      • 2.Qd5#
    • 1...Qd5
      • 2.Qxd5#
    • 1...Rb3
      • 2.Qd4#
    • 1...Rd3
      • 2.Qxd3#
    • 1...Rxf4
      • 2.Qd3#
    • 1...Ra8
      • 2.Rd4#
    • 1...Rb8
      • 2.Rd4#
    • 1...Rc8
      • 2.Rd4#
    • 1...Re8
      • 2.Rd4#
    • 1...Rf8
      • 2.Rd4#
    • 1...Rg8
      • 2.Rd4#
    • 1...Rh8
      • 2.Rd4#
    • 1...g5
      • 2.Qd5#
  • Tries
    • 1.Sd5?
      • threat
        • 2.Sxb6#
      • 1...Qxd5
        • 2.Qxd5#
      • 1...Rf6
        • 2.Se3#
      • 1...Ba5
        • 2.Rc7#
      • 1...Bc5
        • 2.Sd6#
      • 1...Bxa3!
    • 1.Qc2+?
      • 1...Bc3
        • 2.Qa2#
      • 1...Rc3!
    • 1.Qe2+?
      • 1...Rd3
        • 2.Qxd3#
      • 1...Kb3!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Sb2#
      • 1...Rxd3
        • 2.Qxd3#
      • 1...Bxa3
        • 2.Qc2#
      • 1...Qe5
        • 2.Sxe5#
      • 1...Bc3
        • 2.Sd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 13
  • Sets
    • Q(f);N_GUARD::QAB1(A)
    • Q(f);N_GUARD,XR(F)::QAB1(A)
    • Q(f);N_GUARD::QAB1(A),XQ(f)
    • R(b);SBLOCK::QAR1(A)
    • R(b);N_GUARD::QAB1(A),XR(b)
    • R(b);N_GUARD,XS(E)::QAB1(A)
    • R(k);N_GUARD::R1(G)
    • P(h);S_CUTQ(f)::QAB1(A)
  • Tries
    • Try
      • S(E);
      • Threat
        • S(E),XP(g)
      • Vars
        • Q(f);OGATE,XS(E)::QAB1(A),XQ(f)
        • R(b);N_GUARD::S(E)
        • B(c);N_GUARD::R(G)
        • B(c);SBLOCK::R(F)+S(D),DCHECK
      • Refutation
        • B(c);XP(C)
    • Try
      • Q(A);CHECK
      • Vars
        • B(c);P_SPINB(c),S_CUTR(b)::QAB(A)
      • Refutation
        • R(b);P_SPINR(b)
    • Try
      • Q(A);CHECK
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::QAB1(A),XR(b)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • R(b);OGATE,XS(E)::QAB1(A),XR(b)
      • B(c);N_GUARD,XP(C)::QAR2(A)
      • Q(f);N_GUARD::S(E),XQ(f)
      • B(c);SBLOCK::R(F)+S(D),DCHECK
HTML5 logo

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).