MESON Chess Problem Database

Problem Display
PID: 139365 (1B3R2/8/K1QN1rp1/2p1r1pB/R3nkP1/5n1P/1p1PP2P/1qN2b2 w - - 0 1)

Neumann, Itzhak

6th Comm., BCPS 031. Ty., 1937

1B3R2/8/K1QN1rp1/2p1r1pB/R3nkP1/5n1P/1p1PP2P/1qN2b2

#2

13 + 11

56 The Problemist 1937
5828 My Selected Chess Problems (Neumann) 1968

SOLUTION

  • SOUND
  • Sets
    • 1...Qa2
      • 2.Sd3#
    • 1...Qd3+
      • 2.Sxd3#
    • 1...Qa1
      • 2.Sd3#
    • 1...Bxe2+
      • 2.Sxe2#
    • 1...Bg2
      • 2.e3#
    • 1...Bxh3
      • 2.e3#
    • 1...c4
      • 2.e3#
  • Tries
    • 1.Qxe4+?
      • 1...Qxe4
        • 2.Sd3#
      • 1...Rxe4!
  • Keys
    • 1.Sc4!
      • threat
        • 2.e3#
      • 1...Bxe2
        • 2.Sxe2#
      • 1...Sfxd2
        • 2.Bxe5#
      • 1...Sxh2
        • 2.Bxe5#
      • 1...Qd3
        • 2.Sxd3#
      • 1...Se1
        • 2.Bxe5#
      • 1...Sg1
        • 2.Bxe5#
      • 1...Sd4
        • 2.Bxe5#
      • 1...Sh4
        • 2.Bxe5#
      • 1...Sd6
        • 2.Qxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 5
  • Sets
    • Q(a);N_GUARD,P_PINR(F)::S(A)
    • Q(a);CHECK,N_GUARD,N_PINP(C)::S(A),XQ(a)
    • B(b);CHECK,XP(C)::S(A),XB(b)
    • B(b);N_PINP(C)::P(C)
    • B(b);N_PINP(C),XP(E)::P(C)
    • P(g);N_PINP(C),N_SPINS(e)::P(C)
  • Tries
    • Try
      • Q(J);CHECK,P_SPINS(K),XS(e)
      • Vars
        • Q(a);P_SPINQ(a),XQ(J)::S(A)
      • Refutation
        • R(h);N_SPINR(j),P_SPINR(h),XQ(J)
  • Actual
    • S(K);N_PINR(j),N_PINS(e),N_SPINP(C),P_PINR(h),P_SPINQ(J)
    • Threat
      • P(C)
    • Vars
      • B(b);P_PINS(K),XP(C)::S(A),XB(b)
      • S(d);N_GUARD,XP(B)::B(L),XR(h)
      • S(d);N_GUARD,XP(D)::B(L),XR(h)
      • Q(a);N_GUARD,P_PINS(K)::S(A),XQ(a)
      • S(d);N_GUARD::B(L),XR(h)
      • S(e);N_PINQ(J),N_SPINR(h),P_SPINR(j)::QAR1(J),XS(d)
HTML5 logo

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).