MESON Chess Problem Database

Problem Display
PID: 76919 (2R1Q1K1/6pp/p7/1pBk4/4pp2/7r/qp1N1P2/3R2rb w - - 0 1)

Svyatov, Gennadi

2nd Prize, Molodoi Leninets, 1978

2R1Q1K1/6pp/p7/1pBk4/4pp2/7r/qp1N1P2/3R2rb

#2

7 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Rg2
      • 2.Qxe4#
    • 1...Rf3
      • 2.Qxe4#
    • 1...f3
      • 2.Qxe4#
  • Tries
    • 1.Sf3+?
      • 1...Rxd1
        • 2.Qf7#
      • 1...Kc4!
    • 1.Sc4+?
      • 1...Rxd1
        • 2.Sb6#
        • 2.Qf7#
      • 1...Rd3
        • 2.Sb6#
        • 2.Qf7#
      • 1...Kxc4!
    • 1.Bb4?
      • threat
        • 2.Rd8#
      • 1...Kd4+
        • 2.Sb3#
      • 1...Rg6
        • 2.Sf3#
      • 1...Rh6
        • 2.Sf1#
      • 1...Qa5!
    • 1.Bd4?
      • threat
        • 2.Rd8#
        • 2.Qd7#
        • 2.Qe5#
      • 1...Kxd4+
        • 2.Sb3#
      • 1...Qa3
        • 2.Qe5#
      • 1...Qa5
        • 2.Qd7#
        • 2.Qe5#
      • 1...Rg5
        • 2.Rd8#
        • 2.Qd7#
      • 1...Rg6
        • 2.Qe5#
      • 1...Rh5
        • 2.Rd8#
        • 2.Qd7#
      • 1...Rh6
        • 2.Qe5#
      • 1...Kd6+!
    • 1.Bb6?
      • threat
        • 2.Rd8#
      • 1...Kd6+
        • 2.Sc4#
      • 1...Rg6
        • 2.Sf3#
      • 1...Rh6
        • 2.Sf1#
      • 1...Qa3!
  • Keys
    • 1.Bd6!
      • threat
        • 2.Qe5#
      • 1...Kd4+
        • 2.Sb3#
      • 1...Kxd6+
        • 2.Sc4#
      • 1...Rg5
        • 2.Sf3#
      • 1...Rh5
        • 2.Sf1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • R(a);S_CUTB(b)::QAB1(F),XP(f)
    • R(e);S_CUTB(b)::QAB1(F),XP(f)
    • P(g);S_CUTB(b)::QAB1(F),XP(f)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • R(a);XR(A)::QAB(F)
      • Refutation
        • K(i);S_FLIGHT
    • Try
      • S(B);CHECK
      • Refutation
        • K(i);S_FLIGHT,XS(B)
    • Try
      • B(D);
      • Threat
        • R(E)
      • Vars
        • K(i);CHECK,P-FLIGHT::R(A)+S(B),DCHECK
        • R(a);N_GUARD::R(A)+S(B)
        • R(e);N_GUARD::R(A)+S(B)
      • Refutation
        • Q(c);
    • Try
      • B(D);
      • Threat
        • DUALS(3)
      • Vars
        • K(i);CHECK,P-FLIGHT,XB(D)::R(A)+S(B),DCHECK
        • Q(c);::QAR1(F)
        • R(a);::QAR1(F)
        • R(e);::QAR1(F)
      • Refutation
        • K(i);CHECK,P-FLIGHT
    • Try
      • B(D);
      • Threat
        • R(E)
      • Vars
        • K(i);CHECK,P-FLIGHT::R(A)+S(B),DCHECK
        • R(a);N_GUARD::R(A)+S(B)
        • R(e);N_GUARD::R(A)+S(B)
      • Refutation
        • Q(c);
  • Actual
    • B(D);
    • Threat
      • QAR1(F)
    • Vars
      • K(i);CHECK,P-FLIGHT::R(A)+S(B),DCHECK
      • K(i);CHECK,P-FLIGHT,XB(D)::R(A)+S(B),DCHECK
      • R(a);N_GUARD::R(A)+S(B)
      • R(e);N_GUARD::R(A)+S(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).