MESON Chess Problem Database

Problem Display
PID: 250205 (2r5/B2p4/n5p1/1pqNR1K1/2pk2P1/4R3/1r1bQ1p1/5b2 w - - 0 1)

Muller, WCAL

De Maasbode, 1927

2r5/B2p4/n5p1/1pqNR1K1/2pk2P1/4R3/1r1bQ1p1/5b2

#2

7 + 12

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Be1
      • 2.R3e4#
    • 1...Bc3
      • 2.R3e4#
    • 1...Bxe3+
      • 2.Qxe3#
    • 1...Bb4
      • 2.R3e4#
    • 1...Ba5
      • 2.R3e4#
  • Tries
    • 1.Sf4?
      • threat
        • 2.Rd5#
      • 1...Bxe2
        • 2.Sxe2#
      • 1...Bxe3
        • 2.Qxe3#
      • 1...Sc7
        • 2.Bxc5#
      • 1...d5
        • 2.Se6#
        • 2.Rxd5#
      • 1...Sb4!
    • 1.Qxd2+?
      • 1...Bd3
        • 2.R3e4#
        • 2.Qc3#
      • 1...Rxd2!
  • Keys
    • 1.Sc3!
      • threat
        • 2.Rd5#
      • 1...Bxe3+
        • 2.Qxe3#
      • 1...Bxe2
        • 2.Sxe2#
      • 1...Bxc3
        • 2.Re4#
      • 1...Sb4
        • 2.Sxb5#
      • 1...Sc7
        • 2.Bxc5#
      • 1...d5
        • 2.Rxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • B(c);N_PINR(B)::R1(B)
    • B(c);CHECK,OGATE,XR(B)::QAB1(A),XB(c)
  • Tries
    • Try
      • S(D);N_SPINR(B),P_SPINR(E)
      • Threat
        • R1(E)
      • Vars
        • B(a);XQ(A)::S(D),XB(a)
        • B(c);OGATE,P_PINS(D),XR(B)::QAB1(A),XB(c)
        • S(i);N_GUARD,S_CUTR(l)::B(G),XQ(h)
      • Refutation
        • S(i);
    • Try
      • Q(A);CHECK,N_SPINR(B),XB(c)
      • Refutation
        • R(b);XQ(A)
  • Actual
    • S(D);
    • Threat
      • R1(E)
    • Vars
      • B(c);CHECK,OGATE,P_PINR(E),XR(B)::QAB1(A),XB(c)
      • B(a);XQ(A)::S(D),XB(a)
      • B(c);N_PINR(B),P_PINR(E),SBLOCK,XS(D)::R1(B)
      • S(i);S_CUTR(b)::S(D),XP(g)
      • S(i);N_GUARD,S_CUTR(l)::B(G),XQ(h)
      • P(k);::R1(E),XP(k)
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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).