MESON Chess Problem Database

Problem Display
PID: 216115 (2Q1b3/2nr4/Rq2p1n1/3kP3/PPNNp3/1B2P1K1/8/B4R2 w - - 0 1)

Gajevskis, A

Sachmatija, 2020

2Q1b3/2nr4/Rq2p1n1/3kP3/PPNNp3/1B2P1K1/8/B4R2

#2

12 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd4
      • 2.Qb7#
    • 1...Qa5
      • 2.Qb7#
    • 1...Qb7
      • 2.Qxb7#
  • Tries
    • 1.Ra5+?
      • 1...Qxa5
        • 2.Qb7#
      • 1...Qc5
        • 2.Rxc5#
        • 2.Qb7#
      • 1...Qb5
        • 2.Qb7#
      • 1...Sb5!
    • 1.Qb7+?
      • 1...Qc6
        • 2.Qxc6#
      • 1...Qxb7!
    • 1.Qxd7+?
      • 1...Qd6
        • 2.Rxd6#
        • 2.Qxd6#
      • 1...Bxd7!
    • 1.Qa8+?
      • 1...Qc6
        • 2.Qxc6#
      • 1...Qb7
        • 2.Qxb7#
      • 1...Sxa8!
  • Keys
    • 1.Sb5!
      • threat
        • 2.Sa5#
      • 1...Qxe3+
        • 2.Sxe3#
      • 1...Kc6
        • 2.Sa5#
      • 1...Qxb5
        • 2.Rd1#
      • 1...Sxe5
        • 2.Sxe5#
      • 1...Qd4
        • 2.Qb7#
      • 1...Qa5
        • 2.Sd2#
        • 2.Sca3#
        • 2.Sxa5#
        • 2.Scd6#
        • 2.Sc3#
        • 2.Rd1#
        • 2.Qb7#
      • 1...Qc5
        • 2.Sc3#
      • 1...Qc6
        • 2.Sb6#
        • 2.Sc3#
        • 2.Rd1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • Q(c);N_GUARD,XS(I)::QAB(L)
    • Q(c);N_GUARD::QAB(L)
    • Q(c);N_GUARD::QAB(L),XQ(c)
  • Tries
    • Try
      • R(K);CHECK
      • Vars
        • Q(c);XR(K)::QAB(L)
        • Q(c);P_SPINQ(c)::QAB(L)
      • Refutation
        • S(f);P_SPINS(f)
    • Try
      • Q(L);CHECK
      • Vars
        • Q(c);N_GUARD,P_SPINQ(c)::QAB1(L),XQ(c)
      • Refutation
        • Q(c);XQ(L)
    • Try
      • Q(L);CHECK,XR(g)
      • Refutation
        • B(h);XQ(L)
    • Try
      • Q(L);CHECK
      • Vars
        • Q(c);N_GUARD,P_SPINQ(c)::QAB1(L),XQ(c)
        • Q(c);N_GUARD,P_SPINQ(c)::QAB(L),XQ(c)
      • Refutation
        • S(f);XQ(L)
  • Actual
    • S(I);
    • Threat
      • B(C)+S(H)
    • Vars
      • Q(c);CHECK,XP(D)::B(C)+S(H),DCHECK,XQ(c)
      • K(b);P_SPINQ(c),P_SPINS(f),S_FLIGHT::S(H)
      • Q(c);N_GUARD,XS(I)::R(B)
      • S(e);XP(J)::B(C)+S(H),XS(e)
      • Q(c);N_GUARD::QAB(L)
      • Q(c);::S(I)
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