MESON Chess Problem Database

Problem Display
PID: 176037 (2q5/4N1Qn/pP3rB1/K3NP2/2RPkr1R/3p4/3P2P1/B7 w - - 0 1)

Neuhaus, Herbert

Schach-Echo, 1936

2q5/4N1Qn/pP3rB1/K3NP2/2RPkr1R/3p4/3P2P1/B7

#2

13 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf5
      • 2.d5#
    • 1...Qe6
      • 2.d5#
    • 1...Qb7
      • 2.d5#
    • 1...Qd7
      • 2.d5#
    • 1...Qc5+
      • 2.dxc5#
    • 1...Qa8
      • 2.d5#
    • 1...Qb8
      • 2.d5#
    • 1...Qd8
      • 2.d5#
    • 1...Qe8
      • 2.d5#
    • 1...Qf8
      • 2.d5#
    • 1...Qg8
      • 2.d5#
    • 1...Qh8
      • 2.d5#
    • 1...Rg4
      • 2.Rxg4#
    • 1...Re6
      • 2.fxe6#
      • 2.f6#
  • Tries
    • 1.S5c6?
      • threat
        • 2.d5#
      • 1...Rxc6
        • 2.Qe5#
      • 1...Qxc6!
    • 1.Qh6?
      • threat
        • 2.Rxf4#
        • 2.Qxf4#
      • 1...Qc5+
        • 2.dxc5#
      • 1...Rxh4
        • 2.Qe3#
        • 2.Qxh4#
      • 1...Rg4
        • 2.Rxg4#
        • 2.Qe3#
      • 1...Sg5!
    • 1.g3?
      • threat
        • 2.Rxf4#
      • 1...Qc5+
        • 2.dxc5#
      • 1...Rg4
        • 2.Rxg4#
      • 1...Rxh4!
  • Keys
    • 1.Sg4!
      • threat
        • 2.Sf2#
      • 1...Qxf5+
        • 2.d5#
      • 1...Qc5+
        • 2.dxc5#
      • 1...R4xf5+
        • 2.Se5#
      • 1...R6xf5+
        • 2.Qe5#
      • 1...Rxg4
        • 2.Rxg4#
      • 1...Rf2
        • 2.Sxf2#
        • 2.Sxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 10
  • Sets
    • Q(g);N_GUARD,P_PINS(H),P_SPINQ(g),XP(I)::R(D)+P(E)
    • Q(g);N_GUARD::R(D)+P(E)
    • Q(g);CHECK,OGATE::R(D)+P(E),XQ(g)
    • Q(g);N_GUARD,P_PINP(J)::R(D)+P(E)
    • R(c);OGATEB::R(F),XR(c)
  • Tries
    • Try
      • S(H);
      • Threat
        • R(D)+P(E)
      • Vars
        • R(e);OGATE,XS(H)::QAR1(M)
      • Refutation
        • Q(g);XS(H)
    • Try
      • Q(M);
      • Threat
        • DUALS(2)
      • Vars
        • Q(g);CHECK,OGATE::R(D)+P(E),XQ(g)
      • Refutation
        • S(f);
    • Try
      • P(C);
      • Threat
        • R1(F),XR(c)
      • Vars
        • Q(g);CHECK,OGATE::R(D)+P(E),XQ(g)
        • R(c);OGATEB::R(F),XR(c)
      • Refutation
        • R(c);N_SPINR(c),XR(F)
  • Actual
    • S(H);N_PINR(c)
    • Threat
      • S(H)
    • Vars
      • Q(g);CHECK,N_GUARD,P_SPINQ(g),XP(I)::R(D)+P(E)
      • Q(g);CHECK,OGATE::R(D)+P(E),XQ(g)
      • R(c);CHECK,P_SPINR(c),XP(I)::R(F)+S(H)
      • R(e);CHECK,OGATE,P_SPINR(e),XP(I)::QAR1(M)
      • R(c);OGATE,P_SPINR(c),XS(H)::R(F),XR(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).