MESON Chess Problem Database

Problem Display
PID: 88047 (1nr5/Kp5Q/1Pk5/n2N2R1/PB4p1/1p1p2q1/3RP1N1/1b1rb2B w - - 0 1)

Savournin, Jacques

The Problemist, 1972

1nr5/Kp5Q/1Pk5/n2N2R1/PB4p1/1p1p2q1/3RP1N1/1b1rb2B

#2

11 + 12

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sc4
      • 2.Qxb7#
    • 1...Sd7
      • 2.Se7#
    • 1...dxe2
      • 2.Se7#
  • Tries
    • 1.Sgf4?
      • threat
        • 2.Rg6#
      • 1...Qxf4
        • 2.Sxf4#
      • 1...dxe2
        • 2.Se7#
      • 1...Qe3
        • 2.Sxe3#
      • 1...Rd8
        • 2.Qc7#
      • 1...Re8
        • 2.Qc7#
      • 1...Rf8
        • 2.Qc7#
      • 1...Rg8
        • 2.Qc7#
      • 1...Sc4
        • 2.Qxb7#
      • 1...Sd7
        • 2.Se7#
      • 1...Qh4!
    • 1.Rg6+?
      • 1...Qd6
        • 2.Rxd6#
      • 1...Kxd5!
    • 1.Qg6+?
      • 1...Qd6
        • 2.Qxd6#
      • 1...Kd7!
    • 1.Qh6+?
      • 1...Qd6
        • 2.Qxd6#
      • 1...Kd7!
    • 1.Qd7+?
      • 1...Sxd7
        • 2.Se7#
      • 1...Kxd7!
  • Keys
    • 1.Sdf4!
      • threat
        • 2.Rg6#
      • 1...Qxf4
        • 2.Sxf4#
      • 1...dxe2
        • 2.Rc5#
      • 1...Qh4
        • 2.Sxh4#
      • 1...Qe3
        • 2.Sxe3#
      • 1...Rd8
        • 2.Qc7#
      • 1...Re8
        • 2.Qc7#
      • 1...Rf8
        • 2.Qc7#
      • 1...Rg8
        • 2.Qc7#
      • 1...Sc4
        • 2.Qxb7#
      • 1...Sd7
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • S(h);N_GUARD::QAB1(K),XP(j)
    • S(k);SBLOCK::S(G)
    • P(e);XP(C)::S(G)
  • Tries
    • Try
      • S(D);
      • Threat
        • R(H)
      • Vars
        • Q(f);XS(D)::B(A)+S(G),XQ(f)
        • P(e);XP(C)::B(A)+S(G),DCHECK
        • Q(f);N_GUARD,P_PINP(I)::B(A)+S(G),XQ(f)
        • R(l);N_GUARD::QAR1(K)
        • S(h);N_GUARD::QAB1(K),XP(j)
        • S(k);SBLOCK::B(A)+S(G),DCHECK
      • Refutation
        • Q(f);
    • Try
      • R(H);CHECK
      • Vars
        • Q(f);N_GUARD,P_SPINQ(f)::R1(H),XQ(f)
      • Refutation
        • K(i);P_SPINP(e),S_FLIGHT,XS(G)
    • Try
      • Q(K);CHECK
      • Vars
        • Q(f);N_GUARD,P_SPINQ(f)::QAR1(K),XQ(f)
      • Refutation
        • K(i);S_FLIGHT
    • Try
      • Q(K);CHECK
      • Vars
        • Q(f);N_GUARD,P_SPINQ(f)::QAR1(K),XQ(f)
      • Refutation
        • K(i);S_FLIGHT
    • Try
      • Q(K);CHECK
      • Vars
        • S(k);SBLOCK,XQ(K)::S(G)
      • Refutation
        • K(i);S_FLIGHT,XQ(K)
  • Actual
    • S(G);
    • Threat
      • R(H)
    • Vars
      • Q(f);XS(G)::B(A)+S(D),XQ(f)
      • P(e);XP(C)::R1(H)
      • Q(f);N_GUARD::B(A)+S(D),XQ(f)
      • Q(f);N_GUARD,P_PINP(I)::B(A)+S(D),XQ(f)
      • R(l);N_GUARD::QAR1(K)
      • S(h);N_GUARD::QAB1(K),XP(j)
      • S(k);SBLOCK::QAB(K)
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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).