MESON Chess Problem Database

Problem Display
PID: 101148 (8/4K3/8/5b2/8/2N1Q3/BBk1P3/n1N1rr2 w - - 0 1)

Nield, Joshua

Good Companions, 1918

8/4K3/8/5b2/8/2N1Q3/BBk1P3/n1N1rr2

#2

7 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe2
      • 2.Qxe2#
  • Tries
    • 1.Se4?
      • threat
        • 2.Qd2#
      • 1...Kd1
        • 2.Qd2#
        • 2.Qd3#
      • 1...Kxb2
        • 2.Qc3#
      • 1...Rxe2
        • 2.Qxe2#
      • 1...Rd1
        • 2.Qc3#
      • 1...Sb3
        • 2.Qxb3#
      • 1...Bxe4!
    • 1.Bxa1?
      • threat
        • 2.Bb1#
        • 2.Bb3#
      • 1...Be6
        • 2.Bb1#
      • 1...Rxc1!
    • 1.Ba3?
      • threat
        • 2.Bb1#
      • 1...Bd3
        • 2.Qxd3#
      • 1...Rxc1!
  • Keys
    • 1.Sb1!
      • threat
        • 2.Qd2#
      • 1...Kd1
        • 2.Qd2#
      • 1...Kxb2
        • 2.Qc3#
      • 1...Rxe2
        • 2.Qxe2#
      • 1...Rd1
        • 2.Qc3#
      • 1...Sb3
        • 2.Qxb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(b);OGATE,P_PINQ(F),XP(D)::QAR2(F),XR(b)
  • Tries
    • Try
      • S(E);
      • Threat
        • QAR1(F)
      • Vars
        • K(d);P-FLIGHT,XB(C)::QAB1(F)
        • R(b);OGATE,XP(D)::QAR2(F),XR(b)
        • R(b);SBLOCK::QAR1(F)
        • S(a);N_GUARD::QAB1(F),XS(a)
      • Refutation
        • B(e);XS(E)
    • Try
      • B(C);XS(a)
      • Threat
        • DUALS(2)
      • Vars
        • B(e);::B(B)
      • Refutation
        • R(b);XS(A)
    • Try
      • B(C);
      • Threat
        • B(B)
      • Vars
        • B(e);N_GUARD::QAB1(F),XB(e)
      • Refutation
        • R(b);XS(A)
  • Actual
    • S(E);
    • Threat
      • QAR1(F)
    • Vars
      • K(d);S_FLIGHT::QAR1(F)
      • K(d);P-FLIGHT,XB(C)::QAB1(F)
      • R(b);OGATE,P_PINQ(F),XP(D)::QAR2(F),XR(b)
      • R(b);SBLOCK::QAR1(F)
      • S(a);N_GUARD::QAB1(F),XS(a)
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