MESON Chess Problem Database

Problem Display
PID: 271678 (8/3p4/3P1P2/1P3PR1/pPN1k1P1/P6p/Q1P1N3/3B1KB1 w - - 0 1)

Shanshin, Valery Yurevich

Due Alfieri, 1980

8/3p4/3P1P2/1P3PR1/pPN1k1P1/P6p/Q1P1N3/3B1KB1

#2

15 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Kf3
      • 2.Sd2#
    • 1...Kd5
      • 2.Sc3#
  • Tries
    • 1.Sg3+?
      • 1...Kd5
        • 2.Bf3#
      • 1...Kf4!
    • 1.Se3?
      • threat
        • 2.Qd5#
      • 1...Kf3
        • 2.Qd5#
      • 1...Ke5!
    • 1.Sb6?
      • threat
        • 2.Qd5#
      • 1...Kf3
        • 2.Qd5#
      • 1...Ke5!
    • 1.Bf2?
      • 1...Kf3
        • 2.Sd2#
      • 1...Kd5
        • 2.Sc3#
      • 1...h2!
    • 1.Be3?
      • threat
        • 2.Sc3#
      • 1...Kd5
        • 2.Sc3#
      • 1...Kf3!
    • 1.Bd4?
      • threat
        • 2.Sd2#
      • 1...Kf3
        • 2.Sd2#
      • 1...Kd5!
    • 1.Bc5?
      • 1...Kf3
        • 2.Sd2#
      • 1...Kd5
        • 2.Sc3#
      • 1...h2!
    • 1.Bb6?
      • 1...Kf3
        • 2.Sd2#
      • 1...Kd5
        • 2.Sc3#
      • 1...h2!
    • 1.Ba7?
      • 1...Kf3
        • 2.Sd2#
      • 1...Kd5
        • 2.Sc3#
      • 1...h2!
    • 1.Rg6?
      • 1...Kf3
        • 2.Sd2#
      • 1...Kd5
        • 2.Sc3#
      • 1...h2!
    • 1.Rg7?
      • 1...Kf3
        • 2.Sd2#
      • 1...Kd5
        • 2.Sc3#
      • 1...h2!
    • 1.Rg8?
      • 1...Kf3
        • 2.Sd2#
      • 1...Kd5
        • 2.Sc3#
      • 1...h2!
    • 1.Qb3?
      • threat
        • 2.Qd3#
      • 1...Kd5
        • 2.Sc3#
        • 2.Qd3#
      • 1...axb3!
    • 1.Qa1?
      • 1...Kf3
        • 2.Sd2#
      • 1...Kd5
        • 2.Qd4#
      • 1...h2!
    • 1.Qb2?
      • 1...Kf3
        • 2.Sd2#
      • 1...Kd5
        • 2.Qd4#
      • 1...h2!
    • 1.f7?
      • 1...Kf3
        • 2.Sd2#
      • 1...Kd5
        • 2.Sc3#
      • 1...h2!
  • Keys
    • 1.Bh2!
      • 1...Kf3
        • 2.Sc3#
      • 1...Kd5
        • 2.Sd2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(c);N_GUARD,S_FLIGHT::S(I)
    • K(c);N_GUARD,S_FLIGHT::S(F)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(c);N_GUARD,S_FLIGHT::B(A)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • S(I);
      • Threat
        • QAB1(D)
      • Vars
        • K(c);S_FLIGHT::QAB(D)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • S(I);
      • Threat
        • QAB1(D)
      • Vars
        • K(c);S_FLIGHT::QAB(D)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • B(C);
      • Vars
        • K(c);N_GUARD,S_FLIGHT::S(I)
        • K(c);N_GUARD,S_FLIGHT::S(F)
      • Refutation
        • P(a);
    • Try
      • B(C);
      • Threat
        • S(F)
      • Vars
        • K(c);S_FLIGHT::S(F)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • B(C);
      • Threat
        • S(I)
      • Vars
        • K(c);S_FLIGHT::S(I)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • B(C);
      • Vars
        • K(c);N_GUARD,S_FLIGHT::S(I)
        • K(c);N_GUARD,S_FLIGHT::S(F)
      • Refutation
        • P(a);
    • Try
      • B(C);
      • Vars
        • K(c);N_GUARD,S_FLIGHT::S(I)
        • K(c);N_GUARD,S_FLIGHT::S(F)
      • Refutation
        • P(a);
    • Try
      • B(C);
      • Vars
        • K(c);N_GUARD,S_FLIGHT::S(I)
        • K(c);N_GUARD,S_FLIGHT::S(F)
      • Refutation
        • P(a);
    • Try
      • R(M);
      • Vars
        • K(c);N_GUARD,S_FLIGHT::S(I)
        • K(c);N_GUARD,S_FLIGHT::S(F)
      • Refutation
        • P(a);
    • Try
      • R(M);
      • Vars
        • K(c);N_GUARD,S_FLIGHT::S(I)
        • K(c);N_GUARD,S_FLIGHT::S(F)
      • Refutation
        • P(a);
    • Try
      • R(M);
      • Vars
        • K(c);N_GUARD,S_FLIGHT::S(I)
        • K(c);N_GUARD,S_FLIGHT::S(F)
      • Refutation
        • P(a);
    • Try
      • Q(D);
      • Threat
        • QAB1(D)
      • Refutation
        • P(b);XQ(D)
    • Try
      • Q(D);
      • Vars
        • K(c);N_GUARD,S_FLIGHT::S(I)
        • K(c);N_GUARD,S_FLIGHT::QAR1(D)
      • Refutation
        • P(a);
    • Try
      • Q(D);
      • Vars
        • K(c);N_GUARD,S_FLIGHT::S(I)
        • K(c);N_GUARD,S_FLIGHT::QAR1(D)
      • Refutation
        • P(a);
    • Try
      • P(O);
      • Vars
        • K(c);N_GUARD,S_FLIGHT::S(I)
        • K(c);N_GUARD,S_FLIGHT::S(F)
      • Refutation
        • P(a);
  • Actual
    • B(C);
    • Vars
      • K(c);N_GUARD,S_FLIGHT::B(A)+S(F)
      • K(c);N_GUARD,S_FLIGHT::QAB(D)+S(I)
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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).