MESON Chess Problem Database

Problem Display
PID: 11194 (8/8/2p2K2/Np1N4/3nkp2/3R4/Q7/4n3 w - - 0 1)

Hissey, S

Chess, 1937

8/8/2p2K2/Np1N4/3nkp2/3R4/Q7/4n3

#2

5 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Se2
      • 2.Qxe2#
    • 1...Sb3
      • 2.Qe2#
    • 1...Sf3
      • 2.Qe2#
    • 1...Se6
      • 2.Qe2#
    • 1...f3
      • 2.Re3#
  • Tries
    • 1.Sb7?
      • threat
        • 2.Sc5#
      • 1...Kxd3
        • 2.Sc5#
      • 1...Sb3
        • 2.Qe2#
      • 1...Se6
        • 2.Qe2#
      • 1...c5
        • 2.Sxc5#
      • 1...Sxd3!
    • 1.Qe2+?
      • 1...Kxd5
        • 2.Qe5#
      • 1...Sxe2!
  • Keys
    • 1.Sb3!
      • threat
        • 2.Sc5#
      • 1...Kxd3
        • 2.Sc5#
      • 1...Kxd5
        • 2.Rxd4#
      • 1...Sxd3
        • 2.Sd2#
      • 1...Sxb3
        • 2.Qe2#
      • 1...Se6
        • 2.Qe2#
      • 1...c5
        • 2.Sxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • S(b);N_GUARD::QAR2(A),XS(b)
    • S(b);N_GUARD::QAR2(A)
    • P(d);N_GUARD::R1(B)
  • Tries
    • Try
      • S(C);
      • Threat
        • S(C)
      • Vars
        • K(c);S_FLIGHT,XR(B)::S(C)
        • S(b);N_GUARD::QAR2(A)
        • P(f);::S(C),XP(f)
      • Refutation
        • S(a);XR(B)
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);OGATE,P_SPINS(b),S_FLIGHT,XS(D)::QAR1(A)
      • Refutation
        • S(b);XQ(A)
  • Actual
    • S(C);
    • Threat
      • S(C)
    • Vars
      • K(c);S_FLIGHT,XR(B)::S(C)
      • K(c);P_SPINS(b),S_FLIGHT,XS(D)::R1(B),XS(b)
      • S(a);SBLOCK,XR(B)::S(C)
      • S(b);N_GUARD,XS(C)::QAR2(A)
      • S(b);N_GUARD::QAR2(A)
      • P(f);::S(C),XP(f)
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