MESON Chess Problem Database

Problem Display
PID: 32373 (1Bn1bR2/2q2N2/1p2p3/r1b3NK/3p1kp1/6p1/1Q1P2p1/1B2R3 w - - 0 1)

Isaev, Leonid Antonovich

Nietvelt, Gustaaf Josephus

De Problemist, 1928

1Bn1bR2/2q2N2/1p2p3/r1b3NK/3p1kp1/6p1/1Q1P2p1/1B2R3

#2

9 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5
      • 2.Bxe5#
    • 1...Ba3
      • 2.Qxd4#
    • 1...Bb4
      • 2.Qxd4#
    • 1...Bd6
      • 2.Qxd4#
    • 1...Be7
      • 2.Qxd4#
    • 1...Bxf8
      • 2.Qxd4#
    • 1...Bd7
      • 2.Sd6#
    • 1...Bxf7+
      • 2.Rxf7#
    • 1...d3
      • 2.Qf6#
  • Tries
    • 1.Sh3+?
      • 1...Kf3
        • 2.Be4#
      • 1...gxh3!
    • 1.Bxc7+?
      • 1...Bd6
        • 2.Qxd4#
      • 1...e5
        • 2.Bxe5#
      • 1...Sd6!
    • 1.Qc3?
      • threat
        • 2.Sxe6#
      • 1...Bxf7+
        • 2.Rxf7#
      • 1...Bxf8
        • 2.Qxd4#
      • 1...d3
        • 2.Qf6#
      • 1...Qe5
        • 2.Bxe5#
      • 1...Ba3
        • 2.Qxd4#
      • 1...Bb4
        • 2.Qxd4#
      • 1...Bd6
        • 2.Qxd4#
      • 1...Be7
        • 2.Qxd4#
      • 1...Bd7
        • 2.Sd6#
      • 1...e5
        • 2.Se6#
      • 1...dxc3!
  • Keys
    • 1.Re3!
      • threat
        • 2.Sxe6#
      • 1...Bxf7+
        • 2.Rxf7#
      • 1...Bxf8
        • 2.Qxd4#
      • 1...dxe3
        • 2.Qf6#
      • 1...d3
        • 2.Qf6#
      • 1...Qe5
        • 2.Bxe5#
      • 1...Ba3
        • 2.Qxd4#
      • 1...Bb4
        • 2.Qxd4#
      • 1...Bd6
        • 2.Qxd4#
      • 1...Be7
        • 2.Qxd4#
      • 1...Bd7
        • 2.Sd6#
      • 1...e5
        • 2.Se6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(j);N_PINS(G),OGATE,P_PINS(E)::B(H),XQ(j)
    • B(g);N_GUARD,N_PINS(G),P_PINS(E)::QAR2(C),XP(c)
    • B(g);N_GUARD,N_PINS(G),N_SPINQ(j),P_PINS(E)::QAR2(C),XP(c)
    • B(g);N_GUARD,N_PINS(G),P_PINS(E),XR(I)::QAR2(C),XP(c)
    • B(l);N_PINS(G)::R(I)+S(G)
    • B(l);CHECK,OGATE,P_SPINB(l),XS(G)::R(I),XB(l)
    • P(c);OGATE::QAR2(C)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(d);N_SPINQ(j),P-FLIGHT::B(A)
      • Refutation
        • P(e);XS(E)
    • Try
      • B(H);CHECK,XQ(j)
      • Vars
        • B(g);N_PINS(G),P_PINS(E),P_SPINB(g)::QAR2(C),XP(c)
        • P(i);P_SPINP(i)::B(H),XP(i)
      • Refutation
        • S(k);P_SPINS(k)
    • Try
      • Q(C);
      • Threat
        • S(E),XP(i)
      • Vars
        • B(l);CHECK,OGATE,P_SPINB(l),XS(G)::R(I),XB(l)
        • B(g);N_GUARD,N_PINS(G),P_PINS(E),XR(I)::QAR2(C),XP(c)
        • P(c);OGATE::QAR2(C)
        • Q(j);N_PINS(G),OGATE,P_PINS(E)::B(H),XQ(j)
        • B(g);N_GUARD,N_PINS(G),P_PINS(E)::QAR2(C),XP(c)
        • B(g);N_GUARD,N_PINS(G),N_SPINQ(j),P_PINS(E)::QAR2(C),XP(c)
        • B(l);N_PINS(G)::R(I)+S(G)
        • P(i);N_SPINQ(j)::S(E)
      • Refutation
        • P(c);XQ(C)
  • Actual
    • R(B);
    • Threat
      • S(E),XP(i)
    • Vars
      • B(l);CHECK,OGATE,P_SPINB(l),XS(G)::R(I),XB(l)
      • B(g);N_GUARD,N_PINS(G),P_PINS(E),XR(I)::QAR2(C),XP(c)
      • P(c);OGATE,XR(B)::QAR2(C)
      • P(c);OGATE::QAR2(C)
      • Q(j);N_PINS(G),OGATE,P_PINS(E)::B(H),XQ(j)
      • B(g);N_GUARD,N_PINS(G),P_PINS(E)::QAR2(C),XP(c)
      • B(g);N_GUARD,N_PINS(G),N_SPINQ(j),P_PINS(E)::QAR2(C),XP(c)
      • B(l);N_PINS(G)::R(I)+S(G)
      • P(i);N_SPINQ(j)::S(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).