MESON Chess Problem Database

Problem Display
PID: 182725 (2nqR3/2p2Q1B/K1p5/4B1p1/6N1/p2r4/2PkN1Pp/2R5 w - - 0 1)

Taylor, A

Problem Observer, 2015

2nqR3/2p2Q1B/K1p5/4B1p1/6N1/p2r4/2PkN1Pp/2R5

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe2
      • 2.Qf2#
    • 1...Rc3
      • 2.Bxc3#
    • 1...Rd5
      • 2.Bc3#
    • 1...Rd6
      • 2.Bc3#
    • 1...Rd7
      • 2.Bc3#
  • Tries
    • 1.Rd1+?
      • 1...Kxc2
        • 2.Se3#
      • 1...Kxe2
        • 2.Qf1#
      • 1...Kxd1!
    • 1.Qf4+?
      • 1...Kxe2
        • 2.Qf2#
      • 1...Re3
        • 2.Qxe3#
      • 1...gxf4!
  • Keys
    • 1.Qa2!
      • threat
        • 2.cxd3#
        • 2.c3#
        • 2.c4#
      • 1...Kxe2
        • 2.cxd3#
      • 1...Qd4
        • 2.c3#
      • 1...Qd5
        • 2.c4#
      • 1...Rb3
        • 2.cxb3#
      • 1...Rc3
        • 2.Bxc3#
      • 1...Re3
        • 2.c3#
        • 2.c4#
      • 1...Rf3
        • 2.c3#
        • 2.c4#
      • 1...Rg3
        • 2.c3#
        • 2.c4#
      • 1...Rh3
        • 2.c3#
        • 2.c4#
      • 1...Rd4
        • 2.c3#
        • 2.c4#
      • 1...Rd5
        • 2.Bc3#
        • 2.c3#
        • 2.c4#
      • 1...Rd6
        • 2.Bc3#
        • 2.c3#
        • 2.c4#
      • 1...Rd7
        • 2.Bc3#
        • 2.c3#
        • 2.c4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • K(a);OGATEB,P-FLIGHT,XS(C)::QAR1(H)
    • R(d);N_GUARD::B(F),XR(d)
    • R(d);N_GUARD::B(F)
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • K(a);P-FLIGHT,P_SPINR(d),XP(B)::S(E)
        • K(a);P-FLIGHT,XS(C)::QAB1(H)
      • Refutation
        • K(a);P-FLIGHT,XR(A)
    • Try
      • Q(H);CHECK
      • Vars
        • K(a);OGATEB,P-FLIGHT,XS(C)::QAR1(H)
        • R(d);N_GUARD,P_SPINR(d)::QAB1(H),XR(d)
      • Refutation
        • P(e);XQ(H)
  • Actual
    • Q(H);
    • Threat
      • DUALS(3)
    • Vars
      • K(a);P-FLIGHT,XS(C)::QAR(H)+P(B),XR(d)
      • Q(i);::QAR(H)+P(B)
      • R(d);OGATE::QAR(H)+P(B),XR(d)
      • R(d);N_GUARD::B(F),XR(d)
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