MESON Chess Problem Database

Problem Display
PID: 211370 (n7/B4Nr1/7Q/2pN2q1/2Pk2p1/1K1pRpP1/1p1r4/1B3b2 w - - 0 1)

Kalkavouras, Ioannis

The Problemist, 1986

n7/B4Nr1/7Q/2pN2q1/2Pk2p1/1K1pRpP1/1p1r4/1B3b2

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe3
      • 2.Qxe3#
    • 1...Qf4
      • 2.Qxf4#
    • 1...Qh4
      • 2.Qf4#
    • 1...Qf6
      • 2.Qxf6#
    • 1...Qd8
      • 2.Qf4#
    • 1...Qh5
      • 2.Qf4#
  • Tries
    • 1.Sd6?
      • threat
        • 2.Sb5#
        • 2.Re4#
      • 1...Qxe3
        • 2.Qxe3#
      • 1...Qxd5
        • 2.Sb5#
      • 1...Qf4
        • 2.Sb5#
        • 2.Qxf4#
      • 1...Qe7
        • 2.Sb5#
        • 2.Sf5#
      • 1...Qe5
        • 2.Sb5#
      • 1...Qf5
        • 2.Sb5#
        • 2.Sxf5#
      • 1...Qg6
        • 2.Sb5#
      • 1...Re2
        • 2.Sb5#
      • 1...Re7
        • 2.Sb5#
      • 1...Sc7
        • 2.Re4#
      • 1...Rb7+!
    • 1.Qxg5?
      • threat
        • 2.Qf4#
        • 2.Qf6#
        • 2.Qe5#
        • 2.Qxg7#
      • 1...Rxf7
        • 2.Qe5#
      • 1...Rg6
        • 2.Qf4#
        • 2.Qe5#
      • 1...Rh7
        • 2.Qf4#
        • 2.Qf6#
        • 2.Qxg4#
        • 2.Qe5#
      • 1...Rg8
        • 2.Qf4#
        • 2.Qf6#
        • 2.Qe5#
      • 1...Rxg5!
    • 1.Qxg7+?
      • 1...Qf6
        • 2.Qxf6#
      • 1...Qe5
        • 2.Qxe5#
      • 1...Qxg7!
    • 1.Qd6?
      • threat
        • 2.Bxc5#
        • 2.Qxc5#
      • 1...Qxe3
        • 2.Sc3#
        • 2.Sf6#
      • 1...Qxd5
        • 2.Bxc5#
      • 1...Qe7
        • 2.Bxc5#
      • 1...Sb6!
    • 1.Qf6+?
      • 1...Qe5
        • 2.Qxe5#
      • 1...Qxf6!
  • Keys
    • 1.Sc3!
      • threat
        • 2.Re4#
      • 1...Kxe3
        • 2.Bxc5#
      • 1...Qxe3
        • 2.Qd6#
      • 1...Qf4
        • 2.Qxf4#
      • 1...Qe7
        • 2.Sb5#
      • 1...Qd5
        • 2.Sb5#
      • 1...Qe5
        • 2.Sb5#
      • 1...Qf5
        • 2.Sb5#
      • 1...Qg6
        • 2.Sb5#
      • 1...Re2
        • 2.Rxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 4
  • Sets
    • Q(i);OGATE,XR(C)::QAB1(G),XQ(i)
    • Q(i);OGATE::QAR2(G),XQ(i)
    • Q(i);OGATE::QAR2(G)
    • Q(i);N_GUARD::QAB(G),XQ(i)
  • Tries
    • Try
      • S(I);
      • Threat
        • DUALS(2)
      • Vars
        • Q(i);OGATE,XR(C)::QAB1(G),XQ(i)
        • Q(i);P_PINP(E),XS(F)::S(I)
        • Q(i);::S(I)
        • R(c);::S(I)
        • R(j);::S(I)
        • S(k);::R1(C)
      • Refutation
        • R(j);CHECK
    • Try
      • Q(G);XQ(i)
      • Threat
        • DUALS(4)
      • Vars
        • R(j);XS(I)::QAB1(G)
      • Refutation
        • R(j);XQ(G)
    • Try
      • Q(G);CHECK,XR(j)
      • Vars
        • Q(i);N_GUARD,P_SPINQ(i)::QAB(G),XQ(i)
        • Q(i);N_GUARD,P_SPINQ(i)::QAB1(G),XQ(i)
      • Refutation
        • Q(i);XQ(G)
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • Q(i);P_PINP(E),P_SPINQ(i),XS(F)::B(H),XP(h)
        • Q(i);::B(H),XP(h)
      • Refutation
        • S(k);N_SPINP(h)
    • Try
      • Q(G);CHECK
      • Vars
        • Q(i);N_GUARD,P_SPINQ(i)::QAB1(G),XQ(i)
      • Refutation
        • Q(i);XQ(G)
  • Actual
    • S(F);
    • Threat
      • R1(C)
    • Vars
      • K(f);P_SPINQ(i),S_FLIGHT,XR(C)::B(H),XP(h)
      • Q(i);N_GUARD,SBLOCK,XR(C)::QAR2(G)
      • Q(i);OGATE::QAR2(G),XQ(i)
      • Q(i);::S(F)
      • Q(i);P_PINP(E)::S(F)
      • R(c);N_GUARD,S_CUTB(a)::R1(C),XP(d)
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).