MESON Chess Problem Database

Problem Display
PID: 15278 (1n1R2n1/6q1/8/4ppp1/2p1kp1b/3p1N2/3B2K1/Q4N2 w - - 0 1)

Schonholzer, Andreas

19th Place, 02. WCCT, 1980-1983

1n1R2n1/6q1/8/4ppp1/2p1kp1b/3p1N2/3B2K1/Q4N2

#2

6 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qh6
      • 2.Qxe5#
    • 1...Qf8
      • 2.Qxe5#
    • 1...Qg6
      • 2.Qxe5#
    • 1...Qa7
      • 2.Qxe5#
    • 1...Qb7
      • 2.Qxe5#
    • 1...Qd7
      • 2.Qxe5#
    • 1...Qf7
      • 2.Qxe5#
    • 1...Qh7
      • 2.Qxe5#
    • 1...Be1
      • 2.Qxe1#
    • 1...Sd7
      • 2.Qa8#
    • 1...Sf6
      • 2.Qxe5#
    • 1...c3
      • 2.Qa4#
  • Tries
    • 1.Sg3+?
      • 1...fxg3
        • 2.Qe1#
      • 1...Bxg3!
    • 1.Sxg5+?
      • 1...Bxg5
        • 2.Qe1#
      • 1...Qxg5+!
    • 1.Bc1?
      • threat
        • 2.S3d2#
      • 1...Qd7
        • 2.Qxe5#
      • 1...Sd7
        • 2.Qa8#
      • 1...d2
        • 2.S3xd2#
        • 2.Qb1#
      • 1...c3
        • 2.Qa4#
      • 1...Be1!
    • 1.Bc3?
      • threat
        • 2.S3d2#
      • 1...Sd7
        • 2.Qa8#
      • 1...Be1
        • 2.Qxe1#
      • 1...d2
        • 2.S3xd2#
        • 2.Qb1#
      • 1...Qd7!
    • 1.Bb4?
      • threat
        • 2.S3d2#
      • 1...Qd7
        • 2.Qxe5#
      • 1...Sd7
        • 2.Qa8#
      • 1...Be1
        • 2.Qxe1#
      • 1...d2
        • 2.S3xd2#
        • 2.Qb1#
      • 1...c3!
    • 1.Ba5?
      • threat
        • 2.S3d2#
      • 1...Qd7
        • 2.Qxe5#
      • 1...Be1
        • 2.Qxe1#
      • 1...d2
        • 2.S3xd2#
        • 2.Qb1#
      • 1...c3
        • 2.Qa4#
      • 1...Sd7!
    • 1.Qa5?
      • threat
        • 2.Qd5#
      • 1...Qb7
        • 2.Qxe5#
      • 1...Qd7
        • 2.Qxe5#
      • 1...Qf7
        • 2.Qxe5#
      • 1...Sd7
        • 2.Qa8#
      • 1...Sf6
        • 2.Qxe5#
      • 1...Se7!
    • 1.Qa8+?
      • 1...Sc6
        • 2.Qxc6#
      • 1...Qb7!
  • Keys
    • 1.Be1!
      • threat
        • 2.S3d2#
      • 1...Bxe1
        • 2.Qxe1#
      • 1...Qd7
        • 2.Qxe5#
      • 1...Sd7
        • 2.Qa8#
      • 1...d2
        • 2.S3xd2#
        • 2.Qb1#
      • 1...c3
        • 2.Qa4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 8
  • Sets
    • Q(i);N_GUARD::QAR1(A),XP(f)
    • B(e);N_GUARD::QAR(A),XB(e)
    • S(j);N_GUARD,S_CUTQ(i)::QAB(A)
    • S(k);S_CUTQ(i)::QAR1(A),XP(f)
    • P(b);OGATEB::QAR(A)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • P(d);XS(B)::QAR(A)
      • Refutation
        • B(e);XS(B)
    • Try
      • S(E);CHECK,P_SPINS(E),XP(h)
      • Vars
        • B(e);XS(E)::QAR(A)
      • Refutation
        • Q(i);CHECK,XS(E)
    • Try
      • B(C);
      • Threat
        • S(E)
      • Vars
        • Q(i);N_GUARD::QAR1(A),XP(f)
        • S(j);N_GUARD,S_CUTQ(i)::QAB(A)
        • P(b);OGATEB::QAR(A)
      • Refutation
        • B(e);
    • Try
      • B(C);
      • Threat
        • S(E)
      • Vars
        • S(j);N_GUARD,S_CUTQ(i)::QAB(A)
        • B(e);N_GUARD::QAR(A),XB(e)
      • Refutation
        • Q(i);
    • Try
      • B(C);
      • Threat
        • S(E)
      • Vars
        • Q(i);N_GUARD::QAR1(A),XP(f)
        • S(j);N_GUARD,S_CUTQ(i)::QAB(A)
        • B(e);N_GUARD::QAR(A),XB(e)
      • Refutation
        • P(b);
    • Try
      • B(C);
      • Threat
        • S(E)
      • Vars
        • Q(i);N_GUARD::QAR1(A),XP(f)
        • B(e);N_GUARD::QAR(A),XB(e)
        • P(b);OGATEB::QAR(A)
      • Refutation
        • S(j);
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • Q(i);N_GUARD::QAR1(A),XP(f)
        • S(j);N_GUARD,S_CUTQ(i)::QAB(A)
        • S(k);S_CUTQ(i)::QAR1(A),XP(f)
      • Refutation
        • S(k);
    • Try
      • Q(A);CHECK
      • Vars
        • S(j);N_GUARD,P_SPINS(j)::QAB(A),XS(j)
      • Refutation
        • Q(i);P_SPINQ(i)
  • Actual
    • B(C);
    • Threat
      • S(E)
    • Vars
      • B(e);OGATE,XB(C)::QAR(A),XB(e)
      • Q(i);N_GUARD::QAR1(A),XP(f)
      • S(j);N_GUARD,S_CUTQ(i)::QAB(A)
      • P(b);OGATEB::QAR(A)
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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).