MESON Chess Problem Database

Problem Display
PID: 177726 (3bR3/Q3q3/8/2P1r1r1/pNR3nB/3Pk3/4N3/n3K2B w - - 0 1)

Eerkes, Allard Pieter

Rigasche Rundschau, 1937

3bR3/Q3q3/8/2P1r1r1/pNR3nB/3Pk3/4N3/n3K2B

#2

10 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc5
      • 2.Qxc5#
    • 1...Rxc5
      • 2.Bxg5#
    • 1...Sf2
      • 2.Bxf2#
    • 1...Sh2
      • 2.Bf2#
    • 1...Sf6
      • 2.Bf2#
    • 1...Sh6
      • 2.Bf2#
  • Tries
    • 1.Sc2+?
      • 1...Kxd3
        • 2.Rc3#
      • 1...Sxc2+!
    • 1.Sd5+?
      • 1...Kxd3
        • 2.Rc3#
      • 1...Rxd5!
  • Keys
    • 1.Rc3!
      • threat
        • 2.d4#
      • 1...Sc2+
        • 2.Sxc2#
      • 1...Qxc5
        • 2.Sd5#
        • 2.Qxc5#
      • 1...Rxc5
        • 2.Bxg5#
      • 1...Qh7
        • 2.Sd5#
      • 1...Sf2
        • 2.Bxf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • Q(g);OGATE,P_SPINQ(g),P_SPINR(e),XP(H)::QAB(I),XQ(g)
    • R(e);N_GUARD,P_SPINQ(g),P_SPINR(e),XP(H)::B(G),XR(f)
    • S(d);N_GUARD::B(G),XS(d)
    • S(d);N_GUARD::B(G)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(b);P-FLIGHT,P_PINS(C),XP(D)::R1(F)
      • Refutation
        • S(a);CHECK,XS(E)
    • Try
      • S(E);CHECK
      • Vars
        • K(b);P-FLIGHT,P_PINS(C),XP(D)::R1(F)
      • Refutation
        • R(e);P_SPINQ(g),XS(E)
  • Actual
    • R(F);
    • Threat
      • R(F)+P(D)
    • Vars
      • S(a);CHECK,N_GUARD::S(E),XS(a)
      • R(e);N_GUARD,P_SPINQ(g),P_SPINR(e),XP(H)::B(G),XR(f)
      • Q(g);P_SPINR(e)::S(E)
      • S(d);N_GUARD::B(G),XS(d)
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Developed and maintained by Brian Stephenson.
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