MESON Chess Problem Database

Problem Display
PID: 93815 (8/Q7/R2p4/2bR4/1k6/p2P4/P7/1K6 w - - 0 1)

Kotrc, Jan

Ceske listy sachove, 1898

8/Q7/R2p4/2bR4/1k6/p2P4/P7/1K6

#2

6 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kb5
      • 2.Rb6#
      • 2.Qb6#
      • 2.Qb7#
    • 1...Bd4
      • 2.Qxd4#
  • Tries
    • 1.Kc2?
      • 1...Kb5
        • 2.Rb6#
        • 2.Qb6#
        • 2.Qb7#
      • 1...Bg1
        • 2.Ra4#
      • 1...Bf2
        • 2.Ra4#
      • 1...Be3
        • 2.Ra4#
      • 1...Bd4
        • 2.Ra4#
        • 2.Qxd4#
      • 1...Bb6
        • 2.Ra4#
        • 2.Rxb6#
        • 2.Qxb6#
      • 1...Bxa7!
    • 1.Rxa3?
      • threat
        • 2.Rb3#
        • 2.Qa4#
        • 2.Qa5#
      • 1...Kb5
        • 2.Qb7#
      • 1...Bb6
        • 2.Rb3#
        • 2.Qa4#
      • 1...Bxa7!
    • 1.Ra4+?
      • 1...Kb5
        • 2.Qa6#
      • 1...Kc3!
    • 1.Qc7?
      • threat
        • 2.Qa5#
      • 1...Kb5
        • 2.Qa5#
        • 2.Qb6#
        • 2.Qb7#
      • 1...Bb6
        • 2.Qc4#
      • 1...Kc3!
  • Keys
    • 1.Rc6!
      • 1...Kc3
        • 2.Qa5#
      • 1...Kb5
        • 2.Rb6#
      • 1...Bxa7
        • 2.Rc4#
      • 1...Bg1
        • 2.Rc4#
        • 2.Qa5#
      • 1...Bf2
        • 2.Rc4#
        • 2.Qa5#
      • 1...Be3
        • 2.Rc4#
        • 2.Qa5#
      • 1...Bd4
        • 2.Rc4#
        • 2.Qxd4#
        • 2.Qa5#
      • 1...Bb6
        • 2.Rc4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • B(c);OGATE::QAR2(F),XB(c)
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Vars
        • B(c);::R1(E)
      • Refutation
        • B(c);XQ(F)
    • Try
      • R(E);XP(a)
      • Threat
        • DUALS(3)
      • Vars
        • K(b);P-FLIGHT,P_SPINB(c)::QAR2(F)
      • Refutation
        • B(c);XQ(F)
    • Try
      • R(E);CHECK
      • Vars
        • K(b);P-FLIGHT,P_SPINB(c)::QAB1(F)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(F);
      • Threat
        • QAB1(F)
      • Vars
        • B(c);OGATE::QAR1(F)
      • Refutation
        • K(b);P_SPINB(c),S_FLIGHT
  • Actual
    • R(E);
    • Vars
      • K(b);P_SPINB(c),S_FLIGHT::QAB(F)
      • K(b);P-FLIGHT,P_SPINB(c)::R1(E)
      • B(c);OGATE,XQ(F)::R1(E)
      • B(c);OGATE::R1(E)
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