MESON Chess Problem Database

Problem Display
PID: 23267 (8/1qp1Np2/3B1p2/1B2PP2/N2kPpK1/6p1/5b2/3rQ1r1 w - - 0 1)

Chandrasekaran, KR

The Problemist, 1997

8/1qp1Np2/3B1p2/1B2PP2/N2kPpK1/6p1/5b2/3rQ1r1

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe4
      • 2.Qc3#
    • 1...Qc6
      • 2.Sxc6#
    • 1...Qc8
      • 2.Sc6#
    • 1...Qa7
      • 2.Sc6#
    • 1...Qb8
      • 2.Sc6#
    • 1...Be3
      • 2.Qb4#
    • 1...fxe5
      • 2.Bc5#
  • Tries
    • 1.Qd2+?
      • 1...Kxe4
        • 2.Sc3#
        • 2.Qxf4#
      • 1...Rxd2!
    • 1.Qxf2+?
      • 1...Kxe4
        • 2.Sc3#
        • 2.Sc5#
        • 2.Qxf4#
      • 1...gxf2+!
    • 1.Qxd1+?
      • 1...Ke3
        • 2.Qd3#
      • 1...Kxe4
        • 2.Qd3#
      • 1...Rxd1!
  • Keys
    • 1.Kxf4!
      • threat
        • 2.Bc5#
        • 2.Qc3#
        • 2.Qb4#
      • 1...Qxe4+
        • 2.Qxe4#
      • 1...Be3+
        • 2.Qxe3#
      • 1...fxe5+
        • 2.Bxe5#
      • 1...Qxb5
        • 2.Qc3#
      • 1...Rdxe1
        • 2.Bc5#
      • 1...Rgxe1
        • 2.Bc5#
      • 1...Bxe1
        • 2.Bc5#
      • 1...cxd6
        • 2.Qc3#
        • 2.Qb4#
      • 1...Qd5
        • 2.Qc3#
      • 1...Qc6
        • 2.Sxc6#
      • 1...Qb6
        • 2.Qc3#
        • 2.Qb4#
      • 1...Qa7
        • 2.Sc6#
        • 2.Qc3#
        • 2.Qb4#
      • 1...Rb1
        • 2.Bc5#
        • 2.Qd2#
        • 2.Qc3#
      • 1...Rc1
        • 2.Qd2#
      • 1...Rd2
        • 2.Bc5#
        • 2.Qxd2#
      • 1...Rd3
        • 2.Bc5#
        • 2.Qb4#
      • 1...c5
        • 2.Bxc5#
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 6
    • REMOVED MATES = 3
  • Sets
    • Q(h);SBLOCK,XP(C)::QAB1(A)
    • Q(h);N_GUARD::S(I),XQ(h)
    • Q(h);N_GUARD,P_PINP(G)::S(I)
    • Q(h);N_GUARD::S(I)
    • B(c);SBLOCK::QAR2(A)
    • P(g);SBLOCK,XP(F)::B(H)
  • Tries
    • Try
      • Q(A);CHECK
      • Refutation
        • R(a);XQ(A)
    • Try
      • Q(A);CHECK,XB(c)
      • Refutation
        • P(d);CHECK,XQ(A)
    • Try
      • Q(A);CHECK,XR(a)
      • Vars
        • K(e);S_FLIGHT::QAR1(A)
        • K(e);P-FLIGHT,XP(C)::QAB1(A)
      • Refutation
        • R(b);XQ(A)
  • Actual
    • K(D);P-FLIGHT,XP(f)
    • Threat
      • DUALS(3)
    • Vars
      • Q(h);CHECK,OGATE,XP(C)::QAR1(A),XQ(h)
      • B(c);CHECK,N_GUARD::QAB1(A),XB(c)
      • P(g);CHECK,OGATE,XP(F)::B(H),XP(g)
      • Q(h);XB(E)::QAB1(A)
      • R(a);XQ(A)::B(H)
      • R(b);XQ(A)::B(H)
      • B(c);XQ(A)::B(H)
      • Q(h);::QAB1(A)
      • Q(h);N_GUARD::S(I),XQ(h)
      • R(a);N_GUARD::QAR2(A)
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