MESON Chess Problem Database

Problem Display
PID: 216250 (3N4/8/np1p1Kp1/2kN1nR1/P1p1b2R/P2p1p2/7B/2Q2B2 w - - 0 1)

Masson, PR

Australasian (The), 1881

3N4/8/np1p1Kp1/2kN1nR1/P1p1b2R/P2p1p2/7B/2Q2B2

#2

10 + 10

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Se3
      • 2.Qxe3#
    • 1...Sg3
      • 2.Qe3#
    • 1...Sxh4
      • 2.Qe3#
    • 1...Sh6
      • 2.Qe3#
    • 1...Se7
      • 2.Qe3#
    • 1...Sg7
      • 2.Qe3#
    • 1...d2
      • 2.Qxc4#
  • Tries
    • 1.Sb4?
      • threat
        • 2.Se6#
        • 2.Qe3#
      • 1...Kd4
        • 2.Se6#
      • 1...c3
        • 2.Qxc3#
      • 1...b5
        • 2.Qe3#
      • 1...Bd5
        • 2.Sxd3#
        • 2.Sxa6#
      • 1...Sc7
        • 2.Qe3#
      • 1...d2
        • 2.Se6#
        • 2.Qxc4#
      • 1...d5
        • 2.Se6#
      • 1...Sxb4!
    • 1.Sc7?
      • threat
        • 2.Qe3#
      • 1...Kd4
        • 2.Sde6#
      • 1...c3
        • 2.Qxc3#
      • 1...Bd5
        • 2.Sxa6#
      • 1...d2
        • 2.Qxc4#
      • 1...d5
        • 2.Sce6#
      • 1...Sxc7!
    • 1.Se7?
      • threat
        • 2.Se6#
        • 2.Qe3#
      • 1...Kd4
        • 2.Se6#
      • 1...c3
        • 2.Qxc3#
      • 1...b5
        • 2.Qe3#
      • 1...Sc7
        • 2.Qe3#
      • 1...d2
        • 2.Se6#
        • 2.Qxc4#
      • 1...d5
        • 2.Se6#
      • 1...Bd5!
    • 1.Rxf5?
      • threat
        • 2.Qe3#
      • 1...Kd4
        • 2.Se6#
        • 2.Qe3#
      • 1...Bxf5
        • 2.Qxc4#
      • 1...c3
        • 2.Qxc3#
      • 1...d2
        • 2.Qxc4#
      • 1...gxf5!
  • Keys
    • 1.Sf4!
      • threat
        • 2.Qe3#
      • 1...Kd4
        • 2.Sde6#
      • 1...c3
        • 2.Qxc3#
      • 1...d5
        • 2.Sfe6#
      • 1...Bd5
        • 2.Sxd3#
      • 1...d2
        • 2.Qxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • S(f);N_GUARD::QAB(A),XS(f)
    • S(f);N_GUARD::QAB(A)
    • S(f);N_GUARD,XR(F)::QAB(A)
    • P(a);::QAR1(A),XP(c)
  • Tries
    • Try
      • S(G);P_PINS(f)
      • Threat
        • DUALS(2)
      • Vars
        • K(e);N_SPINP(c),N_SPINS(f),P_SPINB(d),S_FLIGHT::S(J)
        • P(c);OGATEB::QAR2(A),XP(c)
        • P(h);::QAB(A)
        • S(g);::QAB(A)
        • P(i);N_SPINS(f)::S(J)
      • Refutation
        • S(g);XS(G)
    • Try
      • S(G);P_PINS(f)
      • Threat
        • QAB(A)
      • Vars
        • K(e);N_SPINP(c),N_SPINS(f),P_SPINB(d),S_FLIGHT::S(J)
        • P(c);OGATEB::QAR2(A),XP(c)
        • B(d);N_SPINS(f),SBLOCK::S(G),XS(g)
        • P(a);::QAR1(A),XP(c)
        • P(i);N_SPINS(f),SBLOCK::S(G)
      • Refutation
        • S(g);XS(G)
    • Try
      • S(G);P_PINS(f)
      • Threat
        • DUALS(2)
      • Vars
        • K(e);N_SPINP(c),N_SPINS(f),P_SPINB(d),S_FLIGHT::S(J)
        • P(c);OGATEB::QAR2(A),XP(c)
        • P(h);::QAB(A)
        • S(g);::QAB(A)
        • P(i);N_SPINS(f)::S(J)
      • Refutation
        • B(d);N_SPINS(f)
    • Try
      • R(H);XS(f)
      • Threat
        • QAB(A)
      • Vars
        • B(d);XR(H)::QAR1(A),XP(c)
        • P(c);OGATEB::QAR2(A),XP(c)
        • P(a);::QAR1(A),XP(c)
      • Refutation
        • P(j);XR(H)
  • Actual
    • S(G);P_PINS(f)
    • Threat
      • QAB(A)
    • Vars
      • K(e);N_SPINP(c),N_SPINS(f),S_FLIGHT::S(J)
      • P(c);OGATEB::QAR2(A),XP(c)
      • P(i);N_SPINS(f),SBLOCK::S(G)
      • B(d);N_GUARD,N_SPINS(f),SBLOCK::S(G),XP(a)
      • P(a);::QAR1(A),XP(c)
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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).