MESON Chess Problem Database

Problem Display
PID: 175046 (8/8/8/2K5/2n3Q1/2R5/4pk2/4Nr1n w - - 0 1)

Wurzburg, Otto

Philadelphia Times, 1901

8/8/8/2K5/2n3Q1/2R5/4pk2/4Nr1n

#2

4 + 5

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe1
      • 2.Rf3#
    • 1...Sg3
      • 2.Qxg3#
    • 1...Se3
      • 2.Sd3#
  • Tries
    • 1.Qxe2+?
      • 1...Kg1
        • 2.Qg2#
      • 1...Kxe2!
    • 1.Qf3+?
      • 1...Kg1
        • 2.Qg2#
      • 1...Kxe1!
    • 1.Qd4+?
      • 1...Kxe1
        • 2.Rc1#
      • 1...Se3!
    • 1.Qf4+?
      • 1...Kxe1
        • 2.Rc1#
      • 1...Kg1!
    • 1.Qh4+?
      • 1...Sg3
        • 2.Qxg3#
      • 1...Kg1!
  • Keys
    • 1.Re3!
      • threat
        • 2.Rxe2#
      • 1...Kxe1
        • 2.Qxe2#
      • 1...Kxe3
        • 2.Qd4#
      • 1...Rxe1
        • 2.Rf3#
      • 1...Sxe3
        • 2.Sd3#
      • 1...Rg1
        • 2.Qxe2#
      • 1...Sg3
        • 2.Qxg3#

There are these versions: 189625

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(a);SBLOCK,XS(A)::R1(B)
    • S(b);N_GUARD::QAB1(C),XS(b)
    • S(e);SBLOCK::S(A)
  • Tries
    • Try
      • Q(C);CHECK,XP(c)
      • Vars
        • K(d);OGATE,S_FLIGHT::QAR1(C)
      • Refutation
        • K(d);P-FLIGHT,XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(d);S_FLIGHT::QAR1(C)
      • Refutation
        • K(d);S_FLIGHT,XS(A)
    • Try
      • Q(C);CHECK
      • Vars
        • K(d);S_FLIGHT,XS(A)::R(B)
      • Refutation
        • S(e);P_SPINS(e)
    • Try
      • Q(C);CHECK
      • Vars
        • K(d);S_FLIGHT,XS(A)::R(B)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAB1(C),XS(b)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • R(B);
    • Threat
      • R1(B),XP(c)
    • Vars
      • K(d);P_SPINP(c),S_FLIGHT,XS(A)::QAR1(C),XP(c)
      • K(d);OGATEB,S_FLIGHT,XR(B)::QAB1(C)
      • R(a);SBLOCK,XS(A)::R1(B)
      • S(e);SBLOCK,XR(B)::S(A)
      • R(a);SBLOCK::QAR1(C),XP(c)
      • S(b);N_GUARD::QAB1(C),XS(b)
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