MESON Chess Problem Database

Problem Display
PID: 233425 (5B2/8/R1R3p1/1k6/3pp3/p2r4/KbN5/1Q6 w - - 0 1)

Gamza, Grigory Stepanovich

Freie Presse, 1996

5B2/8/R1R3p1/1k6/3pp3/p2r4/KbN5/1Q6

#2

6 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rd1
      • 2.Sxa3#
    • 1...Rd2
      • 2.Sxa3#
    • 1...Rc3
      • 2.Sxd4#
    • 1...Re3
      • 2.Sxd4#
    • 1...Rf3
      • 2.Sxd4#
    • 1...Rg3
      • 2.Sxd4#
    • 1...Rh3
      • 2.Sxd4#
  • Tries
    • 1.Qe1?
      • threat
        • 2.Qb4#
        • 2.Qa5#
      • 1...Rb3
        • 2.Qa5#
      • 1...Rc3
        • 2.Sxd4#
      • 1...Bc3
        • 2.Sxa3#
      • 1...Rd2!
    • 1.Qxb2+?
      • 1...Rb3
        • 2.Sxa3#
        • 2.Sxd4#
        • 2.Qxb3#
      • 1...axb2!
  • Keys
    • 1.Qf1!
      • 1...Ba1
        • 2.Sxa3#
      • 1...Bc1
        • 2.Sxd4#
      • 1...Bc3
        • 2.Sxa3#
      • 1...e3
        • 2.Qxd3#
      • 1...g5
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 7
  • Sets
    • R(c);N_GUARD::S(C),XP(b)
    • R(c);N_GUARD::S(C),XP(d)
  • Tries
    • Try
      • Q(A);N_PINB(a)
      • Threat
        • DUALS(2)
      • Vars
        • R(c);::QAR1(A)
        • R(c);N_GUARD,S_CUTB(a)::S(C),XP(d)
        • B(a);N_GUARD,S_CUTR(c)::S(C),XP(b)
      • Refutation
        • R(c);
    • Try
      • Q(A);CHECK,XB(a)
      • Refutation
        • P(b);XQ(A)
  • Actual
    • Q(A);N_PINB(a),P_PINR(c)
    • Vars
      • B(a);N_GUARD::S(C),XP(b)
      • B(a);N_GUARD::S(C),XP(d)
      • P(e);N_GUARD::QAB(A),XR(c)
      • P(g);N_GUARD::QAR(A)
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