MESON Chess Problem Database

Problem Display
PID: 268529 (B2K4/2PN4/n1PQNp2/5Pp1/Rn1qk1P1/1P1R4/2p1Pp2/b4r2 w - - 0 1)

Moutecidis, Pavlos

The Problemist, 1956

B2K4/2PN4/n1PQNp2/5Pp1/Rn1qk1P1/1P1R4/2p1Pp2/b4r2

#2

13 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qb2
      • 2.Qd5#
    • 1...Qc3
      • 2.Qd5#
    • 1...Qe3
      • 2.Qd5#
    • 1...Qb6
      • 2.Qd5#
    • 1...Qa7
      • 2.Qd5#
    • 1...Qxd3
      • 2.Qxd3#
    • 1...Qd5
      • 2.Qxd5#
    • 1...Sa2
      • 2.Sxf6#
    • 1...Sxc6+
      • 2.Bxc6#
      • 2.Qxc6#
  • Tries
    • 1.Rxd4+?
      • 1...Bxd4
        • 2.Qxd4#
      • 1...Ke3!
    • 1.Rxb4?
      • threat
        • 2.Sxf6#
      • 1...Qxb4
        • 2.Qd5#
      • 1...Qc4
        • 2.Qd5#
      • 1...Sxb4!
    • 1.Qf4+?
      • 1...Kd5
        • 2.Sb6#
        • 2.Sxf6#
        • 2.e4#
      • 1...gxf4!
  • Keys
    • 1.Qg3!
      • threat
        • 2.Qg2#
        • 2.Qf3#
      • 1...Qxd7+
        • 2.cxd7#
      • 1...Sxc6+
        • 2.Bxc6#
      • 1...Kd5
        • 2.Sxf6#
      • 1...Qxd3
        • 2.Qxd3#
      • 1...Sxd3
        • 2.Qf3#
      • 1...Qe3
        • 2.Qxe3#
      • 1...Rg1
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 6
  • Sets
    • Q(f);N_GUARD,P_SPINS(e)::QAB1(H)
    • Q(f);N_GUARD,P_PINP(J),P_SPINS(e)::QAB1(H)
    • Q(f);OGATE,P_SPINS(e),XR(C)::QAB1(H),XQ(f)
    • Q(f);N_GUARD,P_SPINS(e)::QAB1(H),XQ(f)
    • S(e);P_SPINQ(f)::S(K),XP(j)
  • Tries
    • Try
      • R(C);CHECK,XQ(f)
      • Vars
        • B(a);OGATE,XR(C)::QAR1(H),XB(a)
      • Refutation
        • K(g);P-FLIGHT
    • Try
      • R(D);P_PINQ(f),XS(e)
      • Threat
        • S(K),XP(j)
      • Vars
        • Q(f);N_SPINQ(f),XR(D)::QAB1(H)
        • Q(f);::QAB1(H)
      • Refutation
        • S(i);N_SPINQ(f),XR(D)
    • Try
      • Q(H);CHECK,P_SPINS(K)
      • Refutation
        • P(h);XQ(H)
  • Actual
    • Q(H);P_SPINS(K)
    • Threat
      • DUALS(2)
    • Vars
      • Q(f);CHECK,OGATE,P_SPINS(e),XS(K)::B(L)+P(G),XQ(f)
      • S(e);CHECK,OGATE,P_SPINQ(f),P_SPINS(e),XP(G)::B(L),XS(e)
      • K(g);N_PINS(K),P_SPINQ(f),S_FLIGHT::S(K),XP(j)
      • Q(f);OGATE,P_SPINS(e),XR(C)::QAB1(H),XQ(f)
      • S(e);P_SPINQ(f),XR(C)::QAB1(H)
      • Q(f);N_GUARD,N_PINS(K),P_SPINS(e)::QAR1(H),XQ(f)
      • R(b);::QAB1(H)
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