MESON Chess Problem Database

Problem Display
PID: 184188 (1n2r3/1KP2B2/1p6/RP1n4/2k5/1NP1R3/P1ppPQ2/3r3b w - - 0 1)

Lytton, Cedric C (was Sells, CCL)

Problem Observer, 2016

1n2r3/1KP2B2/1p6/RP1n4/2k5/1NP1R3/P1ppPQ2/3r3b

#2

11 + 9

SOLUTION

  • SOUND
  • Tries
    • 1.Re4+?
      • 1...Kxc3
        • 2.Qd4#
      • 1...Bxe4
        • 2.Qd4#
      • 1...Rxe4!
    • 1.Re5?
      • threat
        • 2.Qd4#
      • 1...Kxc3
        • 2.Qd4#
      • 1...bxa5
        • 2.Qc5#
      • 1...Sc6!
    • 1.Re7?
      • threat
        • 2.Qd4#
      • 1...Kxc3
        • 2.Qd4#
      • 1...bxa5
        • 2.Qc5#
      • 1...Sc6!
    • 1.Rxe8?
      • threat
        • 2.Qd4#
      • 1...Kxc3
        • 2.Qd4#
      • 1...bxa5
        • 2.Qc5#
      • 1...Sc6!
    • 1.c8Q+?
      • 1...Sc6
        • 2.Qxc6#
      • 1...Rxc8!
    • 1.c8R+?
      • 1...Sc6
        • 2.Rxc6#
      • 1...Rxc8!
  • Keys
    • 1.Re6!
      • threat
        • 2.Qd4#
      • 1...Sxc3+
        • 2.Re4#
      • 1...Se3+
        • 2.Rc6#
      • 1...Sb4+
        • 2.Rc6#
      • 1...Sf4+
        • 2.Rc6#
      • 1...Sf6+
        • 2.Rc6#
      • 1...Sxc7+
        • 2.Rc6#
      • 1...Se7+
        • 2.Rc6#
      • 1...Kxc3
        • 2.Qd4#
      • 1...bxa5
        • 2.Qc5#
      • 1...Sc6
        • 2.Rxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(F);CHECK
      • Vars
        • K(e);N_SPINS(f),P-FLIGHT,XP(E)::QAB1(C)
        • B(b);XR(F)::QAR1(C)
      • Refutation
        • R(i);XR(F)
    • Try
      • R(F);
      • Threat
        • QAR1(C)
      • Vars
        • K(e);N_SPINS(f),P-FLIGHT,XP(E)::QAB1(C)
        • P(g);N_GUARD,XR(G)::QAR1(C)
      • Refutation
        • S(h);
    • Try
      • R(F);
      • Threat
        • QAR1(C)
      • Vars
        • K(e);N_SPINS(f),P-FLIGHT,XP(E)::QAB1(C)
        • P(g);N_GUARD,XR(G)::QAR1(C)
      • Refutation
        • S(h);
    • Try
      • R(F);XR(i)
      • Threat
        • QAR1(C)
      • Vars
        • K(e);N_SPINS(f),P-FLIGHT,XP(E)::QAB1(C)
        • P(g);N_GUARD,XR(G)::QAR1(C)
      • Refutation
        • S(h);
    • Try
      • P(J);CHECK
      • Vars
        • S(h);N_GUARD::QAR2(J),XS(h)
      • Refutation
        • R(i);XQ(J)
    • Try
      • P(J);CHECK
      • Vars
        • S(h);N_GUARD::R(J),XS(h)
      • Refutation
        • R(i);XR(J)
  • Actual
    • R(F);N_PINS(f)
    • Threat
      • QAR1(C)
    • Vars
      • S(f);CHECK,SBLOCK,XP(E)::B(K)+R(F),DCHECK
      • S(f);CHECK::B(K)+R(F),DCHECK
      • S(f);CHECK,XP(J)::B(K)+R(F),DCHECK
      • K(e);P-FLIGHT,XP(E)::QAB1(C)
      • P(g);N_GUARD,XR(G)::QAR1(C)
      • S(h);N_GUARD::R(F),XS(h)
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