MESON Chess Problem Database

Problem Display
PID: 193702 (1K6/3R4/Q7/8/1k6/3r4/3P4/N3B3 w - - 0 1)

Wurzburg, Otto

Pittsburgh Gazette-Times, 1915

1K6/3R4/Q7/8/1k6/3r4/3P4/N3B3

#2

6 + 2

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rd5
      • 2.d4#
    • 1...Rd6
      • 2.d4#
    • 1...Rxd7
      • 2.d4#
  • Tries
    • 1.Rc7?
      • threat
        • 2.Rc4#
      • 1...Rc3
        • 2.dxc3#
      • 1...Rd4
        • 2.d3#
      • 1...Rd8+!
    • 1.Qb5+?
      • 1...Ka3
        • 2.Ra7#
      • 1...Kxb5!
    • 1.Qb6+?
      • 1...Ka3
        • 2.Ra7#
      • 1...Ka4
        • 2.Ra7#
      • 1...Kc4!
  • Keys
    • 1.Rd5!
      • 1...Rxd2
        • 2.Bxd2#
      • 1...Rxd5
        • 2.d4#
      • 1...Ra3
        • 2.Qb5#
      • 1...Rb3
        • 2.Sc2#
      • 1...Rc3
        • 2.dxc3#
      • 1...Re3
        • 2.dxe3#
      • 1...Rf3
        • 2.d3#
      • 1...Rg3
        • 2.d3#
      • 1...Rh3
        • 2.d3#
      • 1...Rd4
        • 2.d3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 2
  • Sets
    • R(a);OGATE::B(B)+P(C)
    • R(a);OGATE,XR(E)::B(B)+P(C)
  • Tries
    • Try
      • R(E);
      • Threat
        • R1(E)
      • Vars
        • R(a);OGATE::P(C),XR(a)
        • R(a);OGATE::B(B)+P(C)
      • Refutation
        • R(a);CHECK
    • Try
      • Q(D);CHECK
      • Vars
        • K(b);S_FLIGHT::R(E)
      • Refutation
        • K(b);P-FLIGHT,XQ(D)
    • Try
      • Q(D);CHECK
      • Vars
        • K(b);S_FLIGHT::R(E)
        • K(b);P-FLIGHT::R(E)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • R(E);
    • Vars
      • R(a);OGATE,P_SPINR(a),XP(C)::B(B),XR(a)
      • R(a);OGATE,XR(E)::B(B)+P(C)
      • R(a);SBLOCK::QAR1(D)
      • R(a);SBLOCK::S(A)
      • R(a);OGATE::P(C),XR(a)
      • R(a);OGATE::B(B)+P(C),XR(a)
      • R(a);OGATE::B(B)+P(C)
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