MESON Chess Problem Database

Problem Display
PID: 66130 (8/8/1P3R2/P1Nk4/3P2RK/1P4N1/3b4/Q1r5 w - - 0 1)

Shankar Ram, Narayanan

1st Prize, The Hindu, 1985

8/8/1P3R2/P1Nk4/3P2RK/1P4N1/3b4/Q1r5

#2

10 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Rh1+
      • 2.Qxh1#
    • 1...Rc2
      • 2.Qh1#
    • 1...Rc4
      • 2.Qh1#
    • 1...Rxc5
      • 2.Qh1#
    • 1...Be1
      • 2.Rg5#
    • 1...Bb4
      • 2.Rg5#
    • 1...Bxa5
      • 2.Rg5#
    • 1...Bg5+
      • 2.Rxg5#
  • Tries
    • 1.Sb7?
      • threat
        • 2.Rd6#
      • 1...Rh1+
        • 2.Qxh1#
      • 1...Bg5+
        • 2.Rxg5#
      • 1...Rc6
        • 2.Qh1#
      • 1...Bb4
        • 2.Rg5#
      • 1...Bf4!
    • 1.Qxc1?
      • threat
        • 2.Qh1#
        • 2.Qc4#
      • 1...Bg5+
        • 2.Qxg5#
      • 1...Bf4
        • 2.Qc4#
      • 1...Be1
        • 2.Qg5#
        • 2.Qc4#
      • 1...Bc3
        • 2.Qg5#
        • 2.Qh1#
      • 1...Bxc1!
  • Keys
    • 1.Sa6!
      • 1...Rh1+
        • 2.Qxh1#
      • 1...Bg5+
        • 2.Rxg5#
      • 1...Rxa1
        • 2.Sc7#
      • 1...Bxa5
        • 2.Rg5#
      • 1...Rb1
        • 2.Sc7#
      • 1...Rd1
        • 2.Sc7#
      • 1...Re1
        • 2.Sc7#
      • 1...Rf1
        • 2.Sc7#
      • 1...Rg1
        • 2.Sc7#
      • 1...Rc2
        • 2.Qh1#
      • 1...Rc3
        • 2.Sb4#
      • 1...Rc4
        • 2.Qh1#
      • 1...Rc5
        • 2.Qh1#
      • 1...Rc6
        • 2.Qh1#
      • 1...Rc7
        • 2.Sxc7#
        • 2.Qh1#
      • 1...Rc8
        • 2.Qh1#
      • 1...Be1
        • 2.Rg5#
      • 1...Bc3
        • 2.Sc7#
      • 1...Be3
        • 2.Sb4#
      • 1...Bb4
        • 2.Sxb4#
        • 2.Rg5#
      • 1...Bf4
        • 2.Sb4#
      • 1...Bh6
        • 2.Sb4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 13
    • REMOVED MATES = 1
  • Sets
    • R(a);CHECK,OGATE::QAB(A),XR(a)
    • R(a);OGATE::QAB(A)
    • R(a);OGATE,XS(H)::QAB(A)
    • B(b);N_GUARD,P_PINS(C)::R(E)
    • B(b);N_GUARD::R(E)
    • B(b);N_GUARD,XP(G)::R(E)
    • B(b);CHECK,N_GUARD::R(E),XB(b)
  • Tries
    • Try
      • S(H);
      • Threat
        • R1(J)
      • Vars
        • R(a);CHECK,OGATE::QAB(A),XR(a)
        • B(b);CHECK,N_GUARD::R(E),XB(b)
        • R(a);OGATE::QAB(A)
        • B(b);N_GUARD::R(E)
      • Refutation
        • B(b);
    • Try
      • Q(A);XR(a)
      • Threat
        • DUALS(2)
      • Vars
        • B(b);CHECK,OGATE::QAR(A),XB(b)
        • B(b);::QAB1(A)
      • Refutation
        • B(b);XQ(A)
  • Actual
    • S(H);
    • Vars
      • R(a);CHECK,OGATE::QAB(A),XR(a)
      • B(b);CHECK,N_GUARD::R(E),XB(b)
      • R(a);N_GUARD,XQ(A)::S(H)
      • B(b);N_GUARD,XP(G)::R(E)
      • R(a);N_GUARD::S(H)
      • R(a);OGATE::QAB(A)
      • R(a);S_CUTB(b)::S(H)
      • B(b);N_GUARD,P_PINS(C)::R(E)
      • B(b);S_CUTR(a)::S(H)
      • B(b);N_GUARD::S(H)
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