MESON Chess Problem Database

Problem Display
PID: 179044 (3K2Q1/2p3b1/2Np1kpp/Rn6/qr4pP/1pN1PP2/2n2R2/1B1r1b2 w - - 0 1)

Eerkes, Allard Pieter

Rietveld, Johannes Jacob

1st Prize, Magasinet, 1938

3K2Q1/2p3b1/2Np1kpp/Rn6/qr4pP/1pN1PP2/2n2R2/1B1r1b2

#2

10 + 14

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Re4
      • 2.fxe4#
    • 1...Bc4
      • 2.fxg4#
    • 1...Scd4
      • 2.Sd5#
    • 1...Sbd4
      • 2.Se4#
  • Tries
    • 1.Ke8?
      • threat
        • 2.Qf7#
      • 1...Re4+
        • 2.fxe4#
      • 1...Bc4
        • 2.fxg4#
      • 1...Kf5!
    • 1.Se4+?
      • 1...Rxe4
        • 2.fxe4#
      • 1...Kf5!
    • 1.Qxg7+?
      • 1...Kf5
        • 2.Qf7#
      • 1...Ke6
        • 2.Qxg6#
      • 1...Kxg7!
  • Keys
    • 1.Kd7!
      • threat
        • 2.Qe6#
      • 1...Kf5
        • 2.Qe6#
      • 1...Re4
        • 2.fxe4#
      • 1...Bc4
        • 2.fxg4#
      • 1...Bf8
        • 2.Qxf8#
      • 1...Bh8
        • 2.Qf8#
      • 1...Scd4
        • 2.Sd5#
      • 1...Sbd4
        • 2.Se4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(f);OGATE::R(B)+P(E),XR(f)
    • B(b);S_CUTR(f)::R(B)+P(E),XP(g)
    • S(c);S_CUTR(a)::S(C)
    • S(h);S_CUTR(f)::S(C)
  • Tries
    • Try
      • K(I);P-FLIGHT
      • Threat
        • QAR1(J)
      • Vars
        • R(f);CHECK,OGATE::R(B)+P(E),XR(f)
        • B(b);S_CUTR(f)::R(B)+P(E),XP(g)
      • Refutation
        • K(j);P-FLIGHT,P_SPINS(c)
    • Try
      • S(C);CHECK
      • Vars
        • R(f);OGATE,XS(C)::R(B)+P(E),XR(f)
      • Refutation
        • K(j);P-FLIGHT,P_SPINS(h)
    • Try
      • Q(J);CHECK,XB(n)
      • Vars
        • K(j);P-FLIGHT,P_SPINS(c)::QAR2(J)
        • K(j);P-FLIGHT::QAR2(J),XP(k)
      • Refutation
        • K(j);S_FLIGHT,XQ(J)
  • Actual
    • K(I);P-FLIGHT
    • Threat
      • QAR1(J)
    • Vars
      • K(j);P-FLIGHT,P_SPINS(c)::QAB1(J)
      • R(f);OGATE::R(B)+P(E),XR(f)
      • B(b);S_CUTR(f)::R(B)+P(E),XP(g)
      • B(n);N_GUARD::QAR2(J),XB(n)
      • B(n);N_GUARD::QAR2(J)
      • S(c);S_CUTR(a)::S(C)
      • S(h);P_PINS(H),S_CUTR(f)::S(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).