MESON Chess Problem Database

Problem Display
PID: 176054 (8/8/7R/4p1pp/1K2k1rp/2P1N2B/4P1N1/4R2Q w - - 0 1)

Groener, A

Schach-Echo, 1936

8/8/7R/4p1pp/1K2k1rp/2P1N2B/4P1N1/4R2Q

#2

9 + 6

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rg3
      • 2.Bf5#
  • Tries
    • 1.Sxg4?
      • threat
        • 2.Sf6#
      • 1...Kd5
        • 2.S2e3#
        • 2.Sf4#
        • 2.e4#
      • 1...Kf5
        • 2.e4#
      • 1...hxg4!
    • 1.Qf1?
      • threat
        • 2.Qf3#
        • 2.Qf5#
      • 1...Rxg2
        • 2.Qf3#
      • 1...Rg3
        • 2.Bf5#
        • 2.Qf5#
      • 1...Rf4!
  • Keys
    • 1.Sd5!
      • 1...Kxd5+
        • 2.Sf4#
      • 1...Kf5+
        • 2.e4#
      • 1...Rxg2
        • 2.Qxg2#
      • 1...Rf4
        • 2.Sgxf4#
      • 1...Rg3
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(b);OGATE::B(G)
  • Tries
    • Try
      • S(F);XR(b)
      • Threat
        • S(F)
      • Vars
        • K(a);OGATE,S_FLIGHT::P(C)
      • Refutation
        • P(f);XS(F)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • R(b);XS(D)::QAB1(B)
      • Refutation
        • R(b);
  • Actual
    • S(F);
    • Vars
      • K(a);CHECK,S_FLIGHT,XS(F)::QAB(B)+S(D),DCHECK
      • K(a);CHECK,OGATE,P_SPINR(b),S_FLIGHT::P(C)
      • R(b);OGATE,P_SPINR(b),XS(D)::QAB(B),XR(b)
      • R(b);N_GUARD::QAB(B)+S(D),XR(b)
      • R(b);::S(F)
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Developed and maintained by Brian Stephenson.
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