MESON Chess Problem Database

Problem Display
PID: 124548 (2b5/2Bp4/1r1p2Kn/1NP1k3/1b2Np2/3R1P2/B7/1q2R3 w - - 0 1)

Sankaran, Nandakumar

Internet, 1998

2b5/2Bp4/1r1p2Kn/1NP1k3/1b2Np2/3R1P2/B7/1q2R3

#2

9 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxa2
      • 2.Sd2#
    • 1...Qc2
      • 2.Sd2#
    • 1...Qb2
      • 2.Sd2#
    • 1...Qb3
      • 2.Sd2#
      • 2.Sec3#
    • 1...Rxb5
      • 2.Bxd6#
    • 1...Rb7
      • 2.Bxd6#
    • 1...Rb8
      • 2.Bxd6#
  • Tries
    • 1.Sg5+?
      • 1...Qxe1
        • 2.Rd5#
      • 1...Bxe1!
  • Keys
    • 1.Rxd6!
      • threat
        • 2.Re6#
      • 1...Qxe4+
        • 2.Rxe4#
      • 1...Rxd6+
        • 2.Bxd6#
      • 1...Qxa2
        • 2.Sd2#
      • 1...Rxb5
        • 2.Rxd7#
      • 1...Qb3
        • 2.Sec3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • Q(a);N_GUARD,XB(B)::R(A)+S(E)
    • Q(a);N_GUARD::R(A)+S(E)
    • R(e);N_GUARD,XS(F)::B(I),XP(f)
    • R(e);N_GUARD::B(I),XP(f)
  • Tries
    • Try
      • S(E);CHECK,P_SPINR(C)
      • Vars
        • Q(a);N_PINR(C),XR(A)::R1(C)
      • Refutation
        • B(b);XR(A)
  • Actual
    • R(C);P_SPINR(C),P_SPINS(E),XP(f)
    • Threat
      • B(I)+R(C),DCHECK
    • Vars
      • Q(a);CHECK,OGATE,P_SPINQ(a),XS(E)::R1(A),XQ(a)
      • R(e);CHECK,OGATE,P_SPINR(e),XR(C)::B(I),XR(e)
      • Q(a);N_PINS(E),XB(B)::R(A)+S(E)
      • R(e);N_PINR(C),XS(F)::B(I)+R(C),XP(h)
      • Q(a);N_PINS(E)::R(A)+S(E)
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