MESON Chess Problem Database

Problem Display
PID: 168370 (5Qq1/3PbBp1/1p2pp2/1K1kNp1R/8/2p2P2/5P2/B3R3 w - - 0 1)

Petite, Efren

Die Schwalbe, 1989

5Qq1/3PbBp1/1p2pp2/1K1kNp1R/8/2p2P2/5P2/B3R3

#2

10 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6
      • 2.d8Q#
    • 1...f4
      • 2.Rd1#
    • 1...fxe5
      • 2.Rd1#
  • Tries
    • 1.Sc4?
      • threat
        • 2.Rd1#
      • 1...Kd4
        • 2.Rd1#
      • 1...c2
        • 2.Rxf5#
      • 1...Bc5!
    • 1.Sc6?
      • threat
        • 2.Rd1#
      • 1...Kd6
        • 2.d8Q#
      • 1...Bc5
        • 2.Rxf5#
      • 1...c2!
    • 1.Bxc3?
      • threat
        • 2.Rd1#
      • 1...Kd6
        • 2.d8Q#
      • 1...Bc5!
    • 1.d8Q+?
      • 1...Bd6
        • 2.Qfxd6#
        • 2.Qdxd6#
      • 1...Bxd8!
    • 1.d8R+?
      • 1...Bd6
        • 2.Rxd6#
        • 2.Qxd6#
      • 1...Bxd8!
  • Keys
    • 1.Rxf5!
      • threat
        • 2.Rd1#
      • 1...Kd4
        • 2.Rd1#
      • 1...Kd6
        • 2.d8Q#
      • 1...Bc5
        • 2.Sc6#
      • 1...c2
        • 2.Sc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • K(b);N_SPINP(e),P-FLIGHT,P_SPINB(g)::P=Q
    • P(c);::R(B)
    • P(f);SBLOCK,XS(F)::R(B)
  • Tries
    • Try
      • S(F);N_PINP(e),P_PINP(c)
      • Threat
        • R(B)
      • Vars
        • K(b);N_SPINP(c),P-FLIGHT,P_SPINP(a)::R(B)
        • P(a);::R(G),XP(c)
      • Refutation
        • B(g);
    • Try
      • S(F);N_PINP(e),P_PINP(c)
      • Threat
        • R(B)
      • Vars
        • K(b);N_SPINP(c),P-FLIGHT,P_SPINB(g)::P=Q
        • B(g);::R(G),XP(c)
      • Refutation
        • P(a);
    • Try
      • B(A);XP(a)
      • Threat
        • R(B)
      • Vars
        • K(b);N_SPINP(e),P-FLIGHT,P_SPINB(g)::P=Q
      • Refutation
        • B(g);
    • Try
      • P(H);CHECK
      • Refutation
        • B(g);XQ(H)
    • Try
      • P(H);CHECK
      • Refutation
        • B(g);XR(H)
  • Actual
    • R(G);XP(c)
    • Threat
      • R(B)
    • Vars
      • K(b);N_SPINP(e),P-FLIGHT,P_SPINP(a)::R(B)
      • K(b);N_SPINP(e),P-FLIGHT,P_SPINB(g)::P=Q
      • B(g);::R(G)+S(F)
      • P(a);::R(G)+S(F)
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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).