MESON Chess Problem Database

Problem Display
PID: 201765 (8/b4R1K/1p2N1Pp/qp4pB/1p2k1r1/1Q1N2p1/P2Pp3/B1Rr3b w - - 0 1)

Witztum, Menachem

Belgrade Internet Ty., 2018

8/b4R1K/1p2N1Pp/qp4pB/1p2k1r1/1Q1N2p1/P2Pp3/B1Rr3b

#2

11 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...g2
      • 2.Sf2#
  • Tries
    • 1.Sxg5+?
      • 1...Rxg5
        • 2.Rf4#
      • 1...hxg5!
    • 1.Rc4+?
      • 1...bxc4
        • 2.Qxc4#
      • 1...Kd5!
    • 1.Rc5?
      • threat
        • 2.Re5#
        • 2.Qd5#
      • 1...Qxa2
        • 2.Re5#
      • 1...Rxd2
        • 2.Re5#
      • 1...Bb8
        • 2.Qd5#
      • 1...bxc5!
    • 1.Re7?
      • threat
        • 2.Sd4#
      • 1...Kf3
        • 2.Qd5#
      • 1...Kf5
        • 2.Sg7#
      • 1...Bb8!
    • 1.Qc3?
      • threat
        • 2.Qd4#
      • 1...Kd5
        • 2.Qe5#
        • 2.Qc6#
      • 1...bxc3!
  • Keys
    • 1.Qb2!
      • threat
        • 2.Qd4#
      • 1...Kxd3
        • 2.Qc2#
      • 1...Kd5
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • P(d);N_GUARD::S(F)
  • Tries
    • Try
      • S(H);CHECK,XP(j)
      • Vars
        • R(g);XS(H)::R1(J)
      • Refutation
        • P(l);XS(H)
    • Try
      • R(B);CHECK
      • Vars
        • P(i);OGATE,XR(B)::QAR2(E),XP(i)
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • R(B);
      • Threat
        • DUALS(2)
      • Vars
        • Q(h);XP(C)::R1(B)
        • R(a);XP(D)::R1(B)
        • B(m);::QAB1(E)
      • Refutation
        • P(k);XR(B)
    • Try
      • R(J);
      • Threat
        • R(J)+S(H)
      • Vars
        • K(f);P_SPINR(g),S_FLIGHT::QAB(E)
        • K(f);S_FLIGHT::S(H)
      • Refutation
        • B(m);
    • Try
      • Q(E);
      • Threat
        • QAR1(E)
      • Refutation
        • P(e);XQ(E)
  • Actual
    • Q(E);
    • Threat
      • QAR1(E)
    • Vars
      • K(f);OGATEB,S_FLIGHT,XS(F)::QAB1(E)
      • K(f);S_FLIGHT::QAR1(E)
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