MESON Chess Problem Database

Problem Display
PID: 235055 (8/2p5/K1P5/2pk2N1/4R3/2PN4/8/Q7 w - - 0 1)

Shanshin, Valery Yurevich

Revista Romana de Sah, 1982

8/2p5/K1P5/2pk2N1/4R3/2PN4/8/Q7

#2

7 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Kb5?
      • 1...c4
        • 2.Rd4#
      • 1...Kd6!
    • 1.Kb7?
      • 1...c4
        • 2.Rd4#
      • 1...Kd6!
    • 1.Sb4+?
      • 1...Kd6
        • 2.Sf7#
        • 2.Re6#
        • 2.Qd1#
      • 1...cxb4!
    • 1.Sf4+?
      • 1...Kd6
        • 2.Re6#
      • 1...Kxc6!
    • 1.Rd4+?
      • 1...Kxc6
        • 2.Se5#
        • 2.Qh1#
        • 2.Qa4#
      • 1...cxd4!
    • 1.Re6?
      • 1...c4
        • 2.Qh1#
        • 2.Qa5#
      • 1...Kc4!
    • 1.Qd1?
      • threat
        • 2.Sb4#
        • 2.Se5#
      • 1...Kxc6
        • 2.Se5#
      • 1...Kd6
        • 2.Sb4#
      • 1...c4!
    • 1.Qg1?
      • threat
        • 2.Qxc5#
      • 1...Kd6
        • 2.Qxc5#
      • 1...c4
        • 2.Qc5#
      • 1...Kxc6!
    • 1.Qa2+?
      • 1...Kxc6
        • 2.Qe6#
      • 1...Kd6
        • 2.Re6#
        • 2.Qe6#
      • 1...c4!
    • 1.Qa3?
      • threat
        • 2.Qxc5#
      • 1...Kd6
        • 2.Qxc5#
      • 1...c4
        • 2.Qc5#
      • 1...Kxc6!
    • 1.Qa4?
      • 1...c4
        • 2.Rd4#
      • 1...Kd6!
    • 1.Qa5?
      • threat
        • 2.Qxc5#
      • 1...Kd6
        • 2.Qxc5#
      • 1...Kxc6!
    • 1.c4+?
      • 1...Kd6
        • 2.Re6#
        • 2.Qf6#
      • 1...Kxc6!
  • Keys
    • 1.Qh1!
      • threat
        • 2.Rd4#
      • 1...Kxc6
        • 2.Rd4#
      • 1...Kd6
        • 2.Re6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(F);S_FLIGHT
      • Vars
        • P(a);N_GUARD::R1(D)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • K(F);S_FLIGHT
      • Vars
        • P(a);N_GUARD::R1(D)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • S(C);CHECK
      • Refutation
        • P(a);XS(C)
    • Try
      • S(C);CHECK
      • Vars
        • K(b);P-FLIGHT::R1(D)
      • Refutation
        • K(b);S_FLIGHT,XP(G)
    • Try
      • R(D);CHECK
      • Refutation
        • P(a);XR(D)
    • Try
      • R(D);
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(b);S_FLIGHT,XP(G)::S(C)
        • K(b);P-FLIGHT::QAR(A)+S(C)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XP(a)
      • Vars
        • K(b);P-FLIGHT::QAB1(A),XP(a)
        • P(a);::QAR1(A)
      • Refutation
        • K(b);S_FLIGHT,XP(G)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT,XP(G)::QAR2(A)
      • Refutation
        • P(a);P_SPINP(a)
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XP(a)
      • Vars
        • K(b);P-FLIGHT,P_SPINP(a)::QAB1(A),XP(a)
        • P(a);::QAR1(A)
      • Refutation
        • K(b);S_FLIGHT,XP(G)
    • Try
      • Q(A);
      • Vars
        • P(a);N_GUARD::R1(D)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);P_PINP(a)
      • Threat
        • QAR1(A),XP(a)
      • Vars
        • K(b);N_SPINP(a),P-FLIGHT::QAB1(A),XP(a)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT,XP(G)
    • Try
      • P(B);CHECK
      • Refutation
        • K(b);S_FLIGHT,XP(G)
  • Actual
    • Q(A);
    • Threat
      • QAB(A)+R(D),DCHECK
    • Vars
      • K(b);S_FLIGHT,XP(G)::QAB(A)+R(D)
      • K(b);P-FLIGHT::R1(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).