MESON Chess Problem Database

Problem Display
PID: 143327 (1R6/Q3pK1k/7p/2p4p/5p2/3R4/n1B5/bq6 w - - 0 1)

Lipton, Michael

The Problemist, 2011

1R6/Q3pK1k/7p/2p4p/5p2/3R4/n1B5/bq6

#2

5 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qd1
      • 2.Rxd1#
    • 1...Qe1
      • 2.Re3#
    • 1...Qg1
      • 2.Rg3#
    • 1...Qh1
      • 2.Rf3#
    • 1...Qb3+
      • 2.Rdxb3#
    • 1...Qb4
      • 2.Rd4#
    • 1...Qb6
      • 2.Rd6#
    • 1...Qb7
      • 2.Rd5#
    • 1...Qxb8
      • 2.Rd8#
  • Tries
    • 1.Rh8+?
      • 1...Kxh8
        • 2.Rd8#
      • 1...Bxh8!
    • 1.Qb7?
      • threat
        • 2.Qe4#
      • 1...Qb3+
        • 2.Rxb3#
      • 1...Qxb7
        • 2.Rd5#
      • 1...Qe1
        • 2.Re3#
      • 1...Qg1
        • 2.Rg3#
      • 1...Qh1
        • 2.Rf3#
      • 1...Qb4
        • 2.Rd4#
      • 1...Qb6
        • 2.Rd6#
      • 1...Sc3!
    • 1.Qxe7?
      • threat
        • 2.Qe4#
      • 1...Qb3+
        • 2.Rdxb3#
      • 1...Qxb8
        • 2.Rd8#
      • 1...Qe1
        • 2.Re3#
      • 1...Qg1
        • 2.Rg3#
      • 1...Qh1
        • 2.Rf3#
      • 1...Qb4
        • 2.Rd4#
      • 1...Qb6
        • 2.Rd6#
      • 1...Qb7
        • 2.Rd5#
      • 1...Sc3
        • 2.Kf6#
      • 1...Be5!
  • Keys
    • 1.Qa8!
      • threat
        • 2.Qe4#
      • 1...Qb3+
        • 2.Rdxb3#
      • 1...Qxb8
        • 2.Rd8#
      • 1...Qe1
        • 2.Re3#
      • 1...Qg1
        • 2.Rg3#
      • 1...Qh1
        • 2.Rf3#
      • 1...Qb4
        • 2.Rd4#
      • 1...Qb6
        • 2.Rd6#
      • 1...Qb7
        • 2.Rd5#
      • 1...Sc3
        • 2.Rh8#

This is a version of 18120

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • Q(b);N_GUARD::B(A)+R(B),XQ(b)
    • Q(b);N_GUARD::B(A)+R(B)
    • Q(b);CHECK,N_GUARD::B(A)+R(B),XQ(b)
    • Q(b);N_GUARD,XR(E)::B(A)+R(B)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • K(i);P-FLIGHT,XR(E)::R(B)
      • Refutation
        • B(a);XR(E)
    • Try
      • Q(C);
      • Threat
        • QAB(C)
      • Vars
        • Q(b);CHECK,N_GUARD::B(A)+R(B),XQ(b)
        • Q(b);N_GUARD,XQ(C)::B(A)+R(B)
        • Q(b);N_GUARD::B(A)+R(B)
      • Refutation
        • S(c);
    • Try
      • Q(C);XP(h)
      • Threat
        • QAB(C)
      • Vars
        • Q(b);CHECK,N_GUARD::B(A)+R(B),XQ(b)
        • Q(b);N_GUARD,XR(E)::B(A)+R(B)
        • Q(b);N_GUARD::B(A)+R(B)
        • Q(b);N_GUARD,P_PINQ(C)::B(A)+R(B)
        • S(c);::QAR(C)+K(D)
      • Refutation
        • B(a);
  • Actual
    • Q(C);
    • Threat
      • QAB(C)
    • Vars
      • Q(b);CHECK,N_GUARD::B(A)+R(B),XQ(b)
      • Q(b);N_GUARD,XR(E)::B(A)+R(B)
      • Q(b);N_GUARD::B(A)+R(B)
      • S(c);S_CUTB(a)::R1(E)
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