MESON Chess Problem Database

Problem Display
PID: 201352 (8/8/2brN3/2p1N2R/4k1p1/1Q1R4/K5n1/8 w - - 0 1)

Wurzburg, Otto

Deutsche Schachblatter, 1922

8/8/2brN3/2p1N2R/4k1p1/1Q1R4/K5n1/8

#2

6 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd3
      • 2.Qxd3#
    • 1...Rxe6
      • 2.Qc4#
    • 1...Se1
      • 2.Re3#
    • 1...Se3
      • 2.Rxe3#
    • 1...Sf4
      • 2.Sxc5#
      • 2.Re3#
    • 1...Sh4
      • 2.Re3#
  • Tries
    • 1.Sxg4?
      • threat
        • 2.Sf2#
        • 2.Sf6#
        • 2.Re5#
      • 1...Rxe6
        • 2.Qc4#
      • 1...Se3
        • 2.Rxe3#
      • 1...Rd5
        • 2.Sf2#
        • 2.Sf6#
      • 1...Rxd3!
    • 1.Sxc6?
      • threat
        • 2.Re5#
      • 1...Rxc6
        • 2.Qc4#
        • 2.Qd5#
      • 1...Rxe6
        • 2.Qc4#
      • 1...Se3
        • 2.Rxe3#
      • 1...Rd5
        • 2.Qxd5#
      • 1...Rxd3!
  • Keys
    • 1.Qc2!
      • threat
        • 2.Qxg2#
      • 1...Bd5+
        • 2.Rb3#
      • 1...Rxd3
        • 2.Qxd3#
      • 1...Rxe6
        • 2.Qc4#
      • 1...Se1
        • 2.Qe2#
      • 1...Se3
        • 2.Rd4#
      • 1...Sf4
        • 2.Sxc5#
      • 1...Sh4
        • 2.Qe2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(f);OGATE,XR(C)::QAB1(B),XR(f)
    • R(f);N_GUARD,XS(F)::QAR2(B)
    • S(a);N_GUARD::R1(C)
    • S(a);N_GUARD::R1(C),XS(a)
  • Tries
    • Try
      • S(D);XP(c)
      • Threat
        • DUALS(3)
      • Vars
        • R(f);N_GUARD,XS(F)::QAR2(B)
        • S(a);N_GUARD::R1(C),XS(a)
      • Refutation
        • R(f);XR(C)
    • Try
      • S(D);XB(e)
      • Threat
        • R1(E)
      • Vars
        • R(f);N_GUARD,XS(F)::QAR2(B)
        • S(a);N_GUARD::R1(C),XS(a)
        • R(f);N_GUARD::QAB1(B),XR(f)
      • Refutation
        • R(f);XR(C)
  • Actual
    • Q(B);
    • Threat
      • QAB(B),XS(a)
    • Vars
      • B(e);CHECK,SBLOCK,S_CUTR(f)::QAB(B)+R(C)
      • R(f);OGATE,P_SPINR(f),XR(C)::QAB1(B),XR(f)
      • R(f);N_GUARD,XS(F)::QAR2(B)
      • S(a);N_GUARD::QAR2(B)
      • S(a);SBLOCK::QAB(B)+R(C),DCHECK
      • S(a);SBLOCK::S(F),XP(d)
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