MESON Chess Problem Database

Problem Display
PID: 158045 (4q1r1/2pB1N1b/pnR4b/KP5Q/2P1kp1p/2P2p2/2P4r/5N2 w - - 0 1)

Andersson, Sven Tore

Problem (Zagreb), 1962

4q1r1/2pB1N1b/pnR4b/KP5Q/2P1kp1p/2P2p2/2P4r/5N2

#2

10 + 12

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd7
      • 2.Qe5#
    • 1...Qe5
      • 2.Qxe5#
    • 1...Qe6
      • 2.Rxe6#
    • 1...Qa8
      • 2.Re6#
      • 2.Qe5#
    • 1...Qb8
      • 2.Re6#
      • 2.Qe5#
    • 1...Qc8
      • 2.Re6#
      • 2.Qe5#
    • 1...Qd8
      • 2.Re6#
      • 2.Qe5#
    • 1...Qf8
      • 2.Re6#
      • 2.Qe5#
    • 1...Rg6
      • 2.Bf5#
      • 2.Qf5#
    • 1...Bg7
      • 2.Qxh7#
    • 1...Bf5
      • 2.Bxf5#
      • 2.Qxf5#
    • 1...Sa4
      • 2.Qd5#
    • 1...Sxc4+
      • 2.Rxc4#
    • 1...Sd5
      • 2.Qxd5#
    • 1...Sxd7
      • 2.Qd5#
    • 1...Sa8
      • 2.Qd5#
    • 1...Sc8
      • 2.Qd5#
    • 1...f2
      • 2.Qe2#
  • Keys
    • 1.Qc5!
      • threat
        • 2.Qd4#
      • 1...Sxc4+
        • 2.Qxc4#
      • 1...Qxd7
        • 2.Qe5#
      • 1...Sxd7
        • 2.Qd5#
      • 1...f2
        • 2.Sd2#
      • 1...Qe5
        • 2.Qxe5#
      • 1...Qe6
        • 2.Rxe6#
      • 1...Rd2
        • 2.Sxd2#
      • 1...Bg7
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • Q(k);N_GUARD,XB(I)::QAR1(G)
    • Q(k);N_GUARD,P_PINP(F)::QAR1(G),XQ(k)
    • Q(k);N_GUARD::R(H),XQ(k)
    • B(h);OGATE::QAB(G),XB(j)
    • S(g);N_GUARD::QAB1(G)
    • S(g);CHECK,OGATE,XP(D)::R(H),XS(g)
    • S(g);N_GUARD::QAB1(G),XS(g)
    • S(g);N_GUARD,XB(I)::QAB1(G)
    • P(b);OGATE::QAR2(G)
  • Actual
    • Q(G);
    • Threat
      • QAR1(G)
    • Vars
      • S(g);CHECK,OGATE,XP(D)::QAR2(G),XS(g)
      • Q(k);N_GUARD,XB(I)::QAR1(G)
      • S(g);N_GUARD,XB(I)::QAB1(G)
      • P(b);S_CUTR(a)::S(A)
      • Q(k);N_GUARD::QAR1(G),XQ(k)
      • Q(k);N_GUARD::R(H),XQ(k)
      • R(a);N_GUARD::S(A),XR(a)
      • B(h);N_GUARD,S_CUTR(l)::S(J)
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