MESON Chess Problem Database

Problem Display
PID: 223132 (8/4N3/1Qp1R3/2n2p2/4P1R1/K2k4/1PNp1nP1/1B4B1 w - - 0 1)

Sumantri, Bambang

US Problem Bulletin, 1965

8/4N3/1Qp1R3/2n2p2/4P1R1/K2k4/1PNp1nP1/1B4B1

#2

11 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Sb3
      • 2.Qa6#
    • 1...Sa4
      • 2.Qa6#
    • 1...Sxe4
      • 2.Qa6#
    • 1...Sa6
      • 2.Qxa6#
    • 1...Sxe6
      • 2.Qa6#
    • 1...Sb7
      • 2.Qa6#
    • 1...Sd7
      • 2.Qa6#
  • Tries
    • 1.Sa1+?
      • 1...Ke3
        • 2.exf5#
      • 1...Kc4
        • 2.Qb4#
      • 1...Kd4
        • 2.exf5#
      • 1...Ke2!
    • 1.Se1+?
      • 1...Ke3
        • 2.exf5#
      • 1...Kc4
        • 2.Qb4#
      • 1...Kd4
        • 2.exf5#
      • 1...Ke2!
    • 1.Se3+?
      • 1...Kxe3
        • 2.exf5#
      • 1...Kd4
        • 2.S7xf5#
      • 1...Ke2!
    • 1.Rg3+?
      • 1...Kc4
        • 2.Rc3#
        • 2.Qb4#
      • 1...Ke2!
    • 1.Rd6+?
      • 1...Kc4
        • 2.Se3#
        • 2.Rd4#
        • 2.Qb4#
      • 1...Ke2!
  • Keys
    • 1.Sd4+!
      • 1...Ke3
        • 2.Sexf5#
      • 1...Kc4
        • 2.Qb4#
      • 1...Kxd4
        • 2.exf5#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • S(d);N_GUARD::QAB(I)
    • S(d);N_GUARD,XP(G)::QAB(I)
    • S(d);N_GUARD::QAB(I),XS(d)
    • S(d);N_GUARD,XR(J)::QAB(I)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(c);P-FLIGHT,P_SPINS(b)::R(J)+P(G),XP(e)
        • K(c);S_FLIGHT::QAR1(I)
        • K(c);P-FLIGHT,P_SPINS(b)::R(H)+P(G),XP(e)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • S(D);CHECK
      • Vars
        • K(c);P-FLIGHT,P_SPINS(b)::R(J)+P(G),XP(e)
        • K(c);S_FLIGHT::QAR1(I)
        • K(c);P-FLIGHT,P_SPINS(b)::R(H)+P(G),XP(e)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • S(D);CHECK
      • Vars
        • K(c);P-FLIGHT,P_SPINS(b),XS(D)::R(J)+P(G),XP(e)
        • K(c);P-FLIGHT,P_SPINS(d)::S(K),XP(e)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • R(H);CHECK
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • R(J);CHECK
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • S(D);CHECK
    • Vars
      • K(c);P-FLIGHT,P_SPINS(b)::S(K),XP(e)
      • K(c);S_FLIGHT::QAR1(I)
      • K(c);P-FLIGHT,P_SPINS(b),XS(D)::R(H)+P(G),XP(e)
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