MESON Chess Problem Database

Problem Display
PID: 234613 (8/8/8/7N/4R3/5k1b/2Q5/6nK w - - 0 1)

Lincoln, Robert A

Kudesnik, 2003

8/8/8/7N/4R3/5k1b/2Q5/6nK

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bg2+
      • 2.Qxg2#
    • 1...Bg4
      • 2.Qg2#
    • 1...Bf5
      • 2.Qg2#
    • 1...Be6
      • 2.Qg2#
    • 1...Bd7
      • 2.Qg2#
    • 1...Bc8
      • 2.Qg2#
    • 1...Se2
      • 2.Qxe2#
  • Tries
    • 1.Kh2?
      • 1...Se2
        • 2.Qxe2#
      • 1...Bg2
        • 2.Qxg2#
      • 1...Bg4
        • 2.Qg2#
      • 1...Bf5
        • 2.Qg2#
      • 1...Be6
        • 2.Qg2#
      • 1...Bd7
        • 2.Qg2#
      • 1...Bc8
        • 2.Qg2#
      • 1...Bf1!
    • 1.Re1?
      • 1...Bg2+
        • 2.Qxg2#
      • 1...Se2
        • 2.Qxe2#
      • 1...Bf1
        • 2.Qf5#
      • 1...Bg4
        • 2.Qg2#
      • 1...Bf5
        • 2.Qxf5#
        • 2.Qg2#
      • 1...Be6
        • 2.Qg2#
      • 1...Bd7
        • 2.Qg2#
      • 1...Bc8
        • 2.Qg2#
      • 1...Kg4!
    • 1.Qd2?
      • threat
        • 2.Rf4#
        • 2.Qe3#
        • 2.Qf4#
      • 1...Bg2+
        • 2.Qxg2#
      • 1...Se2
        • 2.Qe3#
        • 2.Qxe2#
      • 1...Kxe4!
    • 1.Qh2?
      • threat
        • 2.Qf4#
      • 1...Bg2+
        • 2.Qxg2#
      • 1...Se2
        • 2.Qxe2#
      • 1...Kxe4!
  • Keys
    • 1.Re5!
      • 1...Bg2+
        • 2.Qxg2#
      • 1...Kg4
        • 2.Qe4#
      • 1...Se2
        • 2.Qxe2#
      • 1...Bf1
        • 2.Qf5#
      • 1...Bg4
        • 2.Qg2#
      • 1...Bf5
        • 2.Qxf5#
        • 2.Qg2#
      • 1...Be6
        • 2.Qg2#
      • 1...Bd7
        • 2.Qg2#
      • 1...Bc8
        • 2.Qg2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • B(c);CHECK,N_GUARD::QAB1(B),XB(c)
    • B(c);N_GUARD::QAB1(B)
    • S(a);N_GUARD::QAB1(B),XS(a)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • S(a);N_GUARD::QAB1(B),XS(a)
        • B(c);N_GUARD::QAB1(B),XB(c)
        • B(c);N_GUARD::QAB1(B)
      • Refutation
        • B(c);
    • Try
      • R(C);
      • Vars
        • B(c);CHECK,N_GUARD::QAB1(B),XB(c)
        • S(a);N_GUARD::QAB1(B),XS(a)
        • B(c);N_GUARD::QAR2(B)
        • B(c);N_GUARD::QAB1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);
      • Threat
        • DUALS(3)
      • Vars
        • B(c);CHECK,N_GUARD::QAB1(B),XB(c)
      • Refutation
        • K(b);S_FLIGHT,XR(C)
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • B(c);CHECK,N_GUARD::QAB1(B),XB(c)
        • S(a);N_GUARD::QAB1(B),XS(a)
      • Refutation
        • K(b);S_FLIGHT,XR(C)
  • Actual
    • R(C);
    • Vars
      • B(c);CHECK,N_GUARD::QAB1(B),XB(c)
      • K(b);S_FLIGHT::QAR2(B)
      • S(a);N_GUARD::QAB1(B),XS(a)
      • B(c);N_GUARD::QAR2(B)
      • B(c);N_GUARD::QAB1(B)
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