MESON Chess Problem Database

Problem Display
PID: 2978 (8/3pN2p/3Pp2P/6P1/p2kpQ2/B5p1/1p3pK1/bN3B1n w - - 0 1)

Page, George

Source?, 1915

8/3pN2p/3Pp2P/6P1/p2kpQ2/B5p1/1p3pK1/bN3B1n

#2

9 + 11

2681 All Change Here! 1919

SOLUTION

  • SOUND
  • Sets
    • 1...e5
      • 2.Qd2#
  • Tries
    • 1.Kxh1?
      • 1...e5
        • 2.Qd2#
      • 1...g2+!
    • 1.Kh3?
      • 1...e5
        • 2.Qd2#
      • 1...g2!
    • 1.Sc8?
      • 1...e5
        • 2.Qd2#
      • 1...Kd5!
    • 1.Sg8?
      • 1...e5
        • 2.Qd2#
      • 1...Kd5!
    • 1.Bb4?
      • 1...e5
        • 2.Qd2#
      • 1...a3!
    • 1.Qxg3?
      • threat
        • 2.Qc3#
      • 1...e3
        • 2.Qf4#
      • 1...Sxg3!
    • 1.Qe5+?
      • 1...Ke3
        • 2.Bc5#
      • 1...Kxe5!
    • 1.Qf3?
      • threat
        • 2.Qc3#
      • 1...Ke5
        • 2.Qf6#
      • 1...e3
        • 2.Qf4#
      • 1...exf3+!
    • 1.Qf6+?
      • 1...Ke3
        • 2.Bc5#
      • 1...e5!
    • 1.Qf8?
      • 1...Ke3
        • 2.Bc5#
      • 1...Ke5
        • 2.Qf6#
      • 1...e3
        • 2.Qf4#
      • 1...e5!
    • 1.g6?
      • 1...e5
        • 2.Qd2#
      • 1...hxg6!
  • Keys
    • 1.Qf7!
      • 1...Ke3
        • 2.Bc5#
      • 1...Ke5
        • 2.Qf6#
      • 1...e5
        • 2.Sf5#
      • 1...e3
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(i);SBLOCK::QAR2(E)
  • Tries
    • Try
      • K(C);S_FLIGHT,XS(b)
      • Vars
        • P(i);SBLOCK::QAR2(E)
      • Refutation
        • P(e);CHECK
    • Try
      • K(C);S_FLIGHT
      • Vars
        • P(i);SBLOCK::QAR2(E)
      • Refutation
        • P(e);
    • Try
      • S(I);
      • Vars
        • P(i);SBLOCK::QAR2(E)
      • Refutation
        • K(g);N_SPINP(h),P-FLIGHT
    • Try
      • S(I);
      • Vars
        • P(i);SBLOCK::QAR2(E)
      • Refutation
        • K(g);N_SPINP(h),P-FLIGHT
    • Try
      • B(D);
      • Vars
        • P(i);SBLOCK::QAR2(E)
      • Refutation
        • P(f);
    • Try
      • Q(E);N_PINP(h),XP(e)
      • Threat
        • QAB1(E)
      • Vars
        • P(h);OGATEB::QAR2(E)
      • Refutation
        • S(b);XQ(E)
    • Try
      • Q(E);CHECK,N_PINP(h)
      • Vars
        • K(g);P_SPINP(h),S_FLIGHT::B(D)
      • Refutation
        • K(g);S_FLIGHT,XQ(E)
    • Try
      • Q(E);N_PINP(h)
      • Threat
        • QAB1(E)
      • Vars
        • K(g);S_FLIGHT::QAB1(E)
        • P(h);OGATEB::QAR2(E)
      • Refutation
        • P(h);CHECK,XQ(E)
    • Try
      • Q(E);CHECK,N_PINP(h)
      • Vars
        • K(g);S_FLIGHT::B(D)
      • Refutation
        • P(i);P_SPINP(i)
    • Try
      • Q(E);N_PINP(h)
      • Vars
        • K(g);S_FLIGHT::B(D)
        • K(g);S_FLIGHT::QAB1(E)
        • P(h);OGATEB::QAR2(E)
      • Refutation
        • P(i);
    • Try
      • P(F);
      • Vars
        • P(i);SBLOCK::QAR2(E)
      • Refutation
        • P(k);XP(F)
  • Actual
    • Q(E);N_PINP(h)
    • Vars
      • K(g);S_FLIGHT::B(D)
      • K(g);S_FLIGHT::QAB1(E)
      • P(i);N_GUARD,SBLOCK::S(I)
      • P(h);OGATEB::QAR2(E)
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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).