MESON Chess Problem Database

Problem Display
PID: 215631 (8/5K2/7Q/2P5/1RPk4/4R1P1/3n4/3nB3 w - - 0 1)

Turnbull, Ronald

The Problemist, 1987

8/5K2/7Q/2P5/1RPk4/4R1P1/3n4/3nB3

#2

8 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc5
      • 2.Qb6#
  • Tries
    • 1.Bxd2?
      • threat
        • 2.Qd6#
      • 1...Kxc5
        • 2.Qb6#
      • 1...Sxe3
        • 2.Qxe3#
      • 1...Sc3!
    • 1.Re2?
      • 1...Kc3
        • 2.Qxd2#
      • 1...Kd3
        • 2.Qxd2#
      • 1...Kxc5
        • 2.Qb6#
      • 1...Sxc4
        • 2.Qd6#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sb2
        • 2.Qe3#
      • 1...Sf2
        • 2.Qe3#
      • 1...Sc3
        • 2.Qe3#
      • 1...Sb1
        • 2.Qd6#
      • 1...Sf1
        • 2.Qd6#
      • 1...Sb3
        • 2.Qd6#
      • 1...Sf3
        • 2.Qd6#
      • 1...Se4!
    • 1.Re7?
      • 1...Kc3
        • 2.Qxd2#
      • 1...Kd3
        • 2.Qxd2#
      • 1...Kxc5
        • 2.Qb6#
      • 1...Sxc4
        • 2.Qd6#
      • 1...Sb2
        • 2.Qe3#
      • 1...Sf2
        • 2.Qe3#
      • 1...Sc3
        • 2.Qe3#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sb1
        • 2.Qd6#
      • 1...Sf1
        • 2.Qd6#
      • 1...Sb3
        • 2.Qd6#
      • 1...Sf3
        • 2.Qd6#
      • 1...Se4!
    • 1.Re8?
      • 1...Kc3
        • 2.Qxd2#
      • 1...Kd3
        • 2.Qxd2#
      • 1...Kxc5
        • 2.Qb6#
      • 1...Sxc4
        • 2.Qd6#
      • 1...Sb2
        • 2.Qe3#
      • 1...Sf2
        • 2.Qe3#
      • 1...Sc3
        • 2.Qe3#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sb1
        • 2.Qd6#
      • 1...Sf1
        • 2.Qd6#
      • 1...Sb3
        • 2.Qd6#
      • 1...Sf3
        • 2.Qd6#
      • 1...Se4!
    • 1.Qf6+?
      • 1...Kxc5
        • 2.Qb6#
      • 1...Kxe3!
  • Keys
    • 1.Re5!
      • 1...Kc3
        • 2.Qxd2#
      • 1...Kd3
        • 2.Qxd2#
      • 1...Kxe5
        • 2.Qf4#
      • 1...Sxc4
        • 2.Qd6#
      • 1...Sb2
        • 2.Qe3#
      • 1...Sf2
        • 2.Qe3#
      • 1...Sc3
        • 2.Qe3#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sb1
        • 2.Qd6#
      • 1...Sf1
        • 2.Qd6#
      • 1...Sb3
        • 2.Qd6#
      • 1...Sf3
        • 2.Qd6#
      • 1...Se4
        • 2.Rd5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 13
    • REMOVED MATES = 1
  • Sets
    • K(c);OGATEB,S_FLIGHT,XP(F)::QAB1(G)
  • Tries
    • Try
      • B(A);XS(b)
      • Threat
        • QAR2(G)
      • Vars
        • K(c);OGATEB,S_FLIGHT,XP(F)::QAB1(G)
        • S(a);OGATE,XR(B)::QAB1(G),XS(a)
      • Refutation
        • S(a);
    • Try
      • R(B);
      • Vars
        • K(c);P_SPINS(b),S_FLIGHT::QAB1(G),XS(b)
        • K(c);P-FLIGHT::QAR1(G),XS(b)
        • K(c);OGATEB,S_FLIGHT,XP(F)::QAB1(G)
        • S(b);P_SPINS(b),XP(E)::QAR2(G)
        • S(a);N_GUARD::QAB1(G),XS(a)
        • S(a);N_GUARD::QAB1(G)
        • S(b);::QAR2(G)
      • Refutation
        • S(b);
    • Try
      • R(B);
      • Vars
        • K(c);P_SPINS(b),S_FLIGHT::QAB1(G),XS(b)
        • K(c);P-FLIGHT::QAR1(G),XS(b)
        • K(c);OGATEB,S_FLIGHT,XP(F)::QAB1(G)
        • S(b);P_SPINS(b),XP(E)::QAR2(G)
        • S(a);N_GUARD::QAB1(G)
        • S(a);N_GUARD::QAB1(G),XS(a)
        • S(b);::QAR2(G)
      • Refutation
        • S(b);
    • Try
      • R(B);
      • Vars
        • K(c);P_SPINS(b),S_FLIGHT::QAB1(G),XS(b)
        • K(c);P-FLIGHT::QAR1(G),XS(b)
        • K(c);OGATEB,S_FLIGHT,XP(F)::QAB1(G)
        • S(b);P_SPINS(b),XP(E)::QAR2(G)
        • S(a);N_GUARD::QAB1(G)
        • S(a);N_GUARD::QAB1(G),XS(a)
        • S(b);::QAR2(G)
      • Refutation
        • S(b);
    • Try
      • Q(G);CHECK
      • Vars
        • K(c);OGATEB,S_FLIGHT,XP(F)::QAB1(G)
      • Refutation
        • K(c);S_FLIGHT,XR(B)
  • Actual
    • R(B);
    • Vars
      • K(c);P_SPINS(b),S_FLIGHT::QAB1(G),XS(b)
      • K(c);P-FLIGHT::QAR1(G),XS(b)
      • K(c);S_FLIGHT,XR(B)::QAB1(G)
      • S(b);P_SPINS(b),XP(E)::QAR2(G)
      • S(a);N_GUARD::QAB1(G)
      • S(a);N_GUARD::QAB1(G),XS(a)
      • S(b);::QAR2(G)
      • S(b);SBLOCK::R1(B)
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).