MESON Chess Problem Database

Problem Display
PID: 86727 (3R4/3bqB2/4pp2/Q7/2pkp1N1/b1p4K/N2rPP2/3RB3 w - - 0 1)

Lamba, Stelian

Problemas, 1976

3R4/3bqB2/4pp2/Q7/2pkp1N1/b1p4K/N2rPP2/3RB3

#2

10 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd1
      • 2.Bxc3#
    • 1...Rd3+
      • 2.e3#
    • 1...c2
      • 2.Rxd2#
    • 1...e5
      • 2.Qd5#
    • 1...f5
      • 2.Qe5#
  • Tries
    • 1.Bxd2?
      • threat
        • 2.Bc1#
        • 2.Be1#
        • 2.Bxc3#
        • 2.Be3#
        • 2.Bf4#
        • 2.Bg5#
        • 2.Bh6#
      • 1...cxd2
        • 2.Rxd2#
      • 1...Bc1
        • 2.Bxc1#
        • 2.Bxc3#
        • 2.Be3#
      • 1...c2
        • 2.Bc3#
        • 2.Be3#
      • 1...e3!
    • 1.Qb6+?
      • 1...Kd5
        • 2.Sxc3#
      • 1...Qc5
        • 2.Rxd7#
      • 1...Bc5!
  • Keys
    • 1.Se3!
      • threat
        • 2.Sc2#
      • 1...e5+
        • 2.Sf5#
      • 1...Qc5
        • 2.Qxc3#
      • 1...Bc5
        • 2.Qxc3#
      • 1...Rd3
        • 2.Bxc3#
      • 1...c2
        • 2.Sxc2#
        • 2.Rxd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • R(a);N_SPINR(a),OGATE,XR(A)::B(B),XP(c)
    • R(a);CHECK::P(D)
    • P(c);N_GUARD::R(A),XR(a)
    • P(g);N_GUARD,P_PINS(G)::QAR1(H)
    • P(h);N_GUARD::QAB1(H)
  • Tries
    • Try
      • B(B);XR(a)
      • Threat
        • DUALS(7)
      • Vars
        • P(c);OGATE,P_SPINP(c),XB(B)::R(A),XP(c)
      • Refutation
        • P(f);
    • Try
      • Q(H);CHECK
      • Vars
        • K(e);P-FLIGHT,P_SPINP(g)::S(C),XP(c)
        • Q(j);P_SPINQ(j)::R(J),XB(i)
      • Refutation
        • B(b);N_SPINB(i),P_SPINB(b)
  • Actual
    • S(G);
    • Threat
      • S(G)
    • Vars
      • P(g);CHECK,N_GUARD::S(G)
      • Q(j);SBLOCK::QAB1(H),XP(c)
      • B(b);SBLOCK::QAB1(H),XP(c)
      • R(a);OGATE,P_PINS(G)::B(B),XP(c)
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