MESON Chess Problem Database

Problem Display
PID: 970 (4K1B1/3RN3/2p2PRB/3pk3/3pN3/1n1P1p2/1Qn5/8 w - - 0 1)

Chandrasekaran, KR

The Problemist Supplement, 1995

4K1B1/3RN3/2p2PRB/3pk3/3pN3/1n1P1p2/1Qn5/8

#2

10 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Sca1
      • 2.Qh2#
    • 1...Se1
      • 2.Qh2#
    • 1...Sa3
      • 2.Qh2#
    • 1...Se3
      • 2.Qh2#
    • 1...Sb4
      • 2.Qh2#
    • 1...Sba1
      • 2.Qb8#
    • 1...Sc1
      • 2.Qb8#
    • 1...Sd2
      • 2.Qb8#
    • 1...Sa5
      • 2.Qb8#
    • 1...Sc5
      • 2.Qb8#
    • 1...c5
      • 2.Rxd5#
  • Tries
    • 1.Sd2?
      • threat
        • 2.Sxf3#
      • 1...Sxd2
        • 2.Qb8#
      • 1...f2
        • 2.Sf3#
      • 1...Se1!
    • 1.Sg3?
      • threat
        • 2.Sxc6#
      • 1...Sa5
        • 2.Qb8#
      • 1...c5
        • 2.Sc6#
        • 2.Rxd5#
      • 1...Sb4!
    • 1.Sc5?
      • 1...Sxc5
        • 2.Qb8#
      • 1...Sca1
        • 2.Qh2#
      • 1...Se1
        • 2.Qh2#
      • 1...Sa3
        • 2.Qh2#
      • 1...Se3
        • 2.Qh2#
      • 1...Sb4
        • 2.Qh2#
      • 1...Sba1
        • 2.Qb8#
      • 1...Sc1
        • 2.Qb8#
      • 1...Sd2
        • 2.Qb8#
      • 1...Sa5
        • 2.Qb8#
      • 1...f2!
    • 1.Sd6?
      • threat
        • 2.Sxc6#
      • 1...Sb4
        • 2.Qh2#
      • 1...c5
        • 2.Sc6#
      • 1...Sa5!
    • 1.Sxd5?
      • threat
        • 2.Rg5#
      • 1...Kf5
        • 2.Rg5#
      • 1...cxd5
        • 2.Rxd5#
      • 1...Se3!
    • 1.Bc1?
      • threat
        • 2.Rg5#
      • 1...Sxc1
        • 2.Qb8#
      • 1...Se3
        • 2.Qh2#
      • 1...Sd2
        • 2.Qb8#
      • 1...dxe4!
    • 1.Be3?
      • threat
        • 2.Rg5#
      • 1...Sxe3
        • 2.Qh2#
      • 1...dxe4!
  • Keys
    • 1.Sg5!
      • threat
        • 2.Sxf3#
      • 1...Kf4
        • 2.Sf7#
      • 1...f2
        • 2.Sf3#
      • 1...Se1
        • 2.Qh2#
      • 1...Sd2
        • 2.Qb8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 9
  • Sets
    • S(a);OGATE::QAB(A)
    • S(b);OGATE::QAB(A)
    • P(g);N_GUARD::R1(G),XP(e)
  • Tries
    • Try
      • S(C);
      • Threat
        • S(C),XP(c)
      • Vars
        • S(b);OGATE,XS(C)::QAB(A)
        • P(c);::S(C)
      • Refutation
        • S(a);
    • Try
      • S(C);
      • Threat
        • S(H),XP(g)
      • Vars
        • S(b);OGATE::QAB(A)
      • Refutation
        • S(a);
    • Try
      • S(C);
      • Vars
        • S(b);OGATE,XS(C)::QAB(A)
        • S(a);OGATE::QAB(A)
        • S(b);OGATE::QAB(A)
      • Refutation
        • P(c);
    • Try
      • S(C);
      • Threat
        • S(H),XP(g)
      • Vars
        • S(a);OGATE::QAB(A)
        • P(g);::S(H)
      • Refutation
        • S(b);
    • Try
      • S(H);XP(e)
      • Threat
        • R(E)
      • Vars
        • K(f);N_SPINP(d),P-FLIGHT::R1(E)
        • P(g);OGATE,XS(H)::R1(G),XP(g)
      • Refutation
        • S(a);
    • Try
      • B(F);
      • Threat
        • R(E)
      • Vars
        • S(b);OGATE,XB(F)::QAB(A)
        • S(a);OGATE::QAB(A)
        • S(b);OGATE::QAB(A)
      • Refutation
        • P(e);XS(C)
    • Try
      • B(F);
      • Threat
        • R(E)
      • Vars
        • S(a);OGATE,XB(F)::QAB(A)
      • Refutation
        • P(e);XS(C)
  • Actual
    • S(C);
    • Threat
      • S(C),XP(c)
    • Vars
      • K(f);N_SPINP(d),S_FLIGHT::B(F)+S(C)
      • P(c);::S(C)
      • S(a);OGATE::QAB(A)
      • S(b);OGATE::QAB(A)
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