MESON Chess Problem Database

Problem Display
PID: 178107 (8/2Q5/2Rp4/2bR4/1k6/p2P4/P7/1K6 w - - 0 1)

Kotrc, Jan

Nove parizske mody, 1898

8/2Q5/2Rp4/2bR4/1k6/p2P4/P7/1K6

#2

6 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kc3
      • 2.Qa5#
    • 1...Bg1
      • 2.Rc4#
      • 2.Qa5#
    • 1...Bf2
      • 2.Rc4#
      • 2.Qa5#
    • 1...Be3
      • 2.Rc4#
      • 2.Qa5#
    • 1...Bd4
      • 2.Rc4#
      • 2.Qa5#
    • 1...Bb6
      • 2.Rc4#
    • 1...Ba7
      • 2.Rc4#
      • 2.Qa5#
  • Tries
    • 1.Rdxc5?
      • threat
        • 2.Qa5#
      • 1...Ka4
        • 2.Qa5#
      • 1...dxc5!
    • 1.Rcxc5?
      • threat
        • 2.Rc4#
        • 2.Rd4#
        • 2.Qa5#
      • 1...Ka4
        • 2.Rc4#
        • 2.Rd4#
        • 2.Qa5#
      • 1...dxc5!
    • 1.Ra6?
      • threat
        • 2.Qa5#
      • 1...Kb5
        • 2.Qa5#
        • 2.Qb6#
        • 2.Qb7#
      • 1...Bb6
        • 2.Qc4#
      • 1...Kc3!
    • 1.Rb6+?
      • 1...Ka4
        • 2.Qa7#
      • 1...Ka5
        • 2.Qa7#
      • 1...Bxb6
        • 2.Qc4#
      • 1...Kc3!
    • 1.Qb6+?
      • 1...Kc3
        • 2.Qa5#
      • 1...Bxb6
        • 2.Rc4#
      • 1...Ka4!
    • 1.Qb7+?
      • 1...Ka4
        • 2.Ra6#
      • 1...Ka5
        • 2.Ra6#
      • 1...Bb6
        • 2.Rc4#
      • 1...Kc3!
  • Keys
    • 1.Qa7!
      • 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 = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);P_SPINB(c),S_FLIGHT::QAB(F)
    • B(c);OGATE::R1(E)
  • Tries
    • Try
      • R(D);XB(c)
      • Threat
        • QAB1(F)
      • Vars
        • K(b);P-FLIGHT::QAR1(F)
      • Refutation
        • P(d);XR(D)
    • Try
      • R(E);XB(c)
      • Threat
        • DUALS(3)
      • Refutation
        • P(d);XR(E)
    • Try
      • R(E);
      • Threat
        • QAB1(F)
      • Vars
        • B(c);OGATE::QAR1(F)
      • Refutation
        • K(b);P_SPINB(c),S_FLIGHT
    • Try
      • R(E);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR(F)
        • K(b);P_SPINB(c),S_FLIGHT::QAR2(F)
        • B(c);OGATE,XR(E)::QAR1(F)
      • Refutation
        • K(b);P_SPINB(c),S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(b);P_SPINB(c),S_FLIGHT::QAB(F)
        • B(c);OGATE,XQ(F)::R1(E)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(b);P-FLIGHT::R(E)
        • K(b);P_SPINB(c),S_FLIGHT::R1(E)
        • B(c);OGATE,P_SPINB(c)::R1(E)
      • Refutation
        • K(b);P_SPINB(c),S_FLIGHT
  • Actual
    • Q(F);
    • 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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