MESON Chess Problem Database

Problem Display
PID: 67320 (4R3/rN2pKn1/4rn2/2Q2R1B/2NPk1pP/4p3/b3P1p1/B7 w - - 0 1)

Savournin, Jacques

Phenix, 2000

4R3/rN2pKn1/4rn2/2Q2R1B/2NPk1pP/4p3/b3P1p1/B7

#2

11 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.Qxe5#
    • 1...Rea6
      • 2.Qe5#
    • 1...Rb6
      • 2.Qe5#
    • 1...Rc6
      • 2.Qe5#
    • 1...Rd6
      • 2.Sxd6#
      • 2.Qe5#
    • 1...Sd5
      • 2.Qxd5#
    • 1...Sfxh5
      • 2.Qd5#
    • 1...Sd7
      • 2.Qd5#
    • 1...Sh7
      • 2.Qd5#
    • 1...Sfxe8
      • 2.Qd5#
    • 1...Sg8
      • 2.Qd5#
    • 1...g3
      • 2.Bf3#
  • Tries
    • 1.Scd6+?
      • 1...exd6
        • 2.Qc2#
      • 1...Rxd6+!
    • 1.Sbd6+?
      • 1...Rxd6
        • 2.Qe5#
      • 1...exd6+!
    • 1.Bxg4?
      • threat
        • 2.Bf3#
      • 1...Sxg4
        • 2.Qd5#
      • 1...Sxf5
        • 2.Qxf5#
      • 1...Re5
        • 2.Qxe5#
      • 1...Sd5
        • 2.Qxd5#
      • 1...g1S!
    • 1.Re5+?
      • 1...Rxe5
        • 2.Qxe5#
      • 1...Kf4!
  • Keys
    • 1.Qd6!
      • threat
        • 2.Rf4#
        • 2.Qf4#
      • 1...Kxf5
        • 2.Bg6#
      • 1...Rxd6
        • 2.Sxd6#
      • 1...Sfxh5
        • 2.Qd5#
      • 1...Sxf5
        • 2.Sc5#
      • 1...Sgxh5
        • 2.Qxe6#
      • 1...exd6
        • 2.Sxd6#
      • 1...Re5
        • 2.Qxe5#
      • 1...Sd5
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 8
  • Sets
    • R(f);N_GUARD,P_PINS(C)::QAR1(F),XR(f)
    • R(f);N_GUARD,P_PINS(C),P_SPINP(i)::QAR1(F)
    • S(g);N_GUARD::QAB1(F),XS(g)
    • S(g);N_GUARD,XB(H)::QAB1(F)
    • S(g);N_GUARD::QAB1(F)
    • S(g);N_GUARD,XR(K)::QAB1(F)
    • P(e);OGATE::B(H)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • P(i);P_PINS(I),P_SPINR(f),XS(C)::QAB(F)
      • Refutation
        • R(f);CHECK,P_SPINP(i),XS(C)
    • Try
      • S(I);CHECK
      • Vars
        • R(f);P_PINS(C),P_SPINP(i),XS(I)::QAR1(F)
      • Refutation
        • P(i);CHECK,P_SPINR(f),XS(I)
    • Try
      • B(H);XP(e)
      • Threat
        • B(H)
      • Vars
        • S(g);N_GUARD,XB(H)::QAB1(F)
        • S(j);OGATE,XR(G)::QAB1(F),XS(j)
        • R(f);N_GUARD,P_PINS(C)::QAR1(F),XR(f)
        • S(g);N_GUARD::QAB1(F),XS(g)
      • Refutation
        • P(b);
    • Try
      • R(G);CHECK
      • Vars
        • R(f);OGATE,P_PINS(C),XR(G)::QAR1(F),XR(f)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • Q(F);
    • Threat
      • DUALS(2)
    • Vars
      • K(d);OGATEB,S_FLIGHT,XR(G)::B(H)
      • R(f);P_PINS(C),P_SPINP(i),XQ(F)::S(I),XR(f)
      • S(g);N_GUARD,XB(H)::QAB1(F)
      • S(j);SBLOCK,XR(G)::S(I)
      • S(j);N_GUARD,XB(H)::QAR2(F),XR(f)
      • P(i);P_PINS(I),P_SPINR(f),XQ(F)::S(C),XP(i)
      • R(f);N_GUARD,P_PINS(C)::QAR1(F),XR(f)
      • S(g);N_GUARD::QAB1(F),XS(g)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).