MESON Chess Problem Database

Problem Display
PID: 182249 (8/1p1Q4/3R4/pp6/1k6/8/K7/8 w - - 0 1)

Ferber, Eugene

Deutsche Schachzeitung, 1906

8/1p1Q4/3R4/pp6/1k6/8/K7/8

#2

3 + 4

5454 Near Snap 2018
6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Ka4
      • 2.Rd4#
  • Tries
    • 1.Rd4+?
      • 1...Kc5
        • 2.Qd6#
      • 1...Kc3!
    • 1.Qg4+?
      • 1...Kc5
        • 2.Qd4#
      • 1...Kc3!
    • 1.Qxb5+?
      • 1...Kc3
        • 2.Qb3#
        • 2.Qc5#
      • 1...Kxb5!
  • Keys
    • 1.Rc6!
      • threat
        • 2.Qg4#
        • 2.Qd4#
      • 1...Ka4
        • 2.Rc4#
      • 1...bxc6
        • 2.Qd4#
      • 1...a4
        • 2.Qd2#

This anticipates 172451(1997)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT,P_SPINP(c)::R(B)
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);CHECK,XP(c)
      • Refutation
        • K(a);P-FLIGHT,XQ(C)
  • Actual
    • R(B);
    • Threat
      • DUALS(2)
    • Vars
      • K(a);P-FLIGHT::R(B)
      • P(d);XR(B)::QAR2(C)
      • P(b);SBLOCK::QAB(C)
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