MESON Chess Problem Database

Problem Display
PID: 23894 (6n1/4R1P1/2ppP1R1/2Pkp1pN/r1nP2p1/1Q6/3P1B2/1B3NK1 w - - 0 1)

Chandrasekaran, KR

3rd HM., diagrammes, 1996

6n1/4R1P1/2ppP1R1/2Pkp1pN/r1nP2p1/1Q6/3P1B2/1B3NK1

#2

13 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sf6
      • 2.Sxf6#
    • 1...Sh6
      • 2.Sf6#
    • 1...exd4
      • 2.Rxg5#
    • 1...e4
      • 2.Rxg5#
    • 1...dxc5
      • 2.Rd7#
  • Tries
    • 1.Sfg3?
      • threat
        • 2.Be4#
      • 1...exd4
        • 2.Rxg5#
      • 1...dxc5
        • 2.Rd7#
      • 1...Sf6
        • 2.Sxf6#
      • 1...e4
        • 2.Bxe4#
        • 2.Rxg5#
      • 1...Ra1!
    • 1.Shg3?
      • threat
        • 2.Be4#
      • 1...exd4
        • 2.Rxg5#
      • 1...dxc5
        • 2.Rd7#
      • 1...e4
        • 2.Bxe4#
        • 2.Rxg5#
      • 1...Sf6!
    • 1.Sf4+?
      • 1...exf4
        • 2.Rxg5#
      • 1...gxf4!
    • 1.Qf3+?
      • 1...e4
        • 2.Bxe4#
        • 2.Qxe4#
      • 1...gxf3!
  • Keys
    • 1.Qd3!
      • threat
        • 2.Qe4#
      • 1...Sxd2
        • 2.Se3#
      • 1...exd4
        • 2.Qxd4#
      • 1...dxc5
        • 2.dxc5#
      • 1...Sb2
        • 2.Se3#
      • 1...Sa3
        • 2.Se3#
      • 1...Se3
        • 2.Sxe3#
      • 1...Sa5
        • 2.Se3#
      • 1...Sb6
        • 2.Se3#
      • 1...Sf6
        • 2.Sxf6#
      • 1...e4
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • S(i);N_GUARD::S(I),XS(i)
    • S(i);N_GUARD::S(I)
    • P(e);OGATEB,XP(G)::R(K),XP(f)
    • P(e);OGATEB::R(K),XP(f)
    • P(h);OGATEB,XP(H)::R(L)
  • Tries
    • Try
      • S(B);
      • Threat
        • B(A)
      • Vars
        • P(e);OGATEB,XP(G)::R(K),XP(f)
        • P(h);OGATEB,XP(H)::R(L)
        • S(i);N_GUARD::S(I),XS(i)
      • Refutation
        • R(a);P_PINB(A)
    • Try
      • S(I);
      • Threat
        • B(A)
      • Vars
        • P(e);OGATEB,XP(G)::R(K),XP(f)
        • P(h);OGATEB,XP(H)::R(L)
      • Refutation
        • S(i);
    • Try
      • S(I);CHECK
      • Vars
        • P(e);XS(I)::R(K),XP(f)
      • Refutation
        • P(f);XS(I)
    • Try
      • Q(F);CHECK,N_PINS(b)
      • Refutation
        • P(c);XQ(F)
  • Actual
    • Q(F);N_PINS(b)
    • Threat
      • QAB1(F)
    • Vars
      • S(b);N_GUARD,XP(D)::S(B)
      • P(e);OGATE,P_SPINP(e),XP(G)::QAR1(F),XP(e)
      • P(h);OGATE,XP(H)::QAR(F)+P(G),XP(h)
      • S(b);N_GUARD::S(B)
      • S(b);N_GUARD::S(B),XS(b)
      • S(i);N_GUARD::S(I),XS(i)
      • P(e);::QAB1(F),XP(e)
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