MESON Chess Problem Database

Problem Display
PID: 96526 (7R/4K3/2p5/3kp3/6P1/4p3/1N2N3/1Q6 w - - 0 1)

Lynn, David P

US Problem Bulletin, 1992

7R/4K3/2p5/3kp3/6P1/4p3/1N2N3/1Q6

#2

6 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...e4
      • 2.Rh5#
  • Tries
    • 1.Kd7?
      • 1...e4
        • 2.Rh5#
      • 1...c5
        • 2.Qd3#
      • 1...Kc5!
    • 1.Rh5?
      • 1...c5
        • 2.Qh1#
      • 1...Kc5!
    • 1.Rh6?
      • 1...e4
        • 2.Rh5#
      • 1...c5
        • 2.Rd6#
        • 2.Qd3#
      • 1...Kc5!
    • 1.Qa2+?
      • 1...Kc5
        • 2.Qa5#
      • 1...Ke4!
    • 1.Qc2?
      • threat
        • 2.Rd8#
        • 2.Qc4#
      • 1...e4
        • 2.Rh5#
      • 1...c5!
    • 1.Qg6?
      • 1...e4
        • 2.Rh5#
        • 2.Qf5#
        • 2.Qh5#
        • 2.Qg5#
        • 2.Qd6#
      • 1...c5
        • 2.Rd8#
      • 1...Kc5!
    • 1.Qc1?
      • threat
        • 2.Qc4#
      • 1...Ke4
        • 2.Qh1#
        • 2.Qxc6#
      • 1...e4
        • 2.Rh5#
      • 1...c5!
    • 1.Qd1+?
      • 1...Ke4
        • 2.Qh1#
      • 1...Kc5!
    • 1.Qe1?
      • 1...Ke4
        • 2.Qh1#
      • 1...Kc5
        • 2.Qa5#
      • 1...e4
        • 2.Rh5#
      • 1...c5!
    • 1.Qh1+?
      • 1...e4
        • 2.Rh5#
        • 2.Qh5#
      • 1...Kc5!
  • Keys
    • 1.Qa1!
      • 1...Ke4
        • 2.Qh1#
      • 1...Kc5
        • 2.Qa5#
      • 1...c5
        • 2.Qa8#
      • 1...e4
        • 2.Rh5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(c);OGATEB::R(F)
  • Tries
    • Try
      • K(E);P-FLIGHT
      • Vars
        • P(c);OGATEB::R(F)
        • P(d);SBLOCK::QAR2(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • R(F);P_PINP(c)
      • Vars
        • P(d);SBLOCK::QAB(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • R(F);
      • Vars
        • P(c);OGATEB::R(F)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR2(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);OGATEB::R(F)
      • Refutation
        • P(d);
    • Try
      • Q(A);
      • Vars
        • P(d);SBLOCK::R(F)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • P(c);OGATEB,SBLOCK::R(F)
      • Refutation
        • P(d);
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(b);S_FLIGHT::QAB(A)
        • K(b);P-FLIGHT::QAR2(A)
        • P(c);OGATEB,SBLOCK::R(F)
      • Refutation
        • P(d);
    • Try
      • Q(A);CHECK
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(b);S_FLIGHT::QAB(A)
      • K(b);P-FLIGHT::QAR2(A)
      • P(d);OGATEB,SBLOCK::QAB(A)
      • P(c);OGATEB,SBLOCK::R(F)
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