MESON Chess Problem Database

Problem Display
PID: 246388 (2b5/7N/2r2P1K/3R1pB1/2P1k1p1/1NR2qP1/1p6/2b2Q2 w - - 0 1)

Hermanson, Halvar

Europe Echecs, 1979

2b5/7N/2r2P1K/3R1pB1/2P1k1p1/1NR2qP1/1p6/2b2Q2

#2

10 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qh1+
      • 2.Qxh1#
    • 1...Qg2
      • 2.Qxg2#
      • 2.Qd3#
    • 1...Qf2
      • 2.Qd3#
    • 1...Qd3
      • 2.Qxd3#
    • 1...Qf4
      • 2.Qd3#
    • 1...Rxc4
      • 2.Qxc4#
    • 1...Rc5
      • 2.Sxc5#
    • 1...Ra6
      • 2.Sc5#
    • 1...Rb6
      • 2.Sc5#
    • 1...Rd6
      • 2.Sc5#
    • 1...Re6
      • 2.Sc5#
    • 1...Rxf6+
      • 2.Sxf6#
    • 1...Bd2
      • 2.Sxd2#
    • 1...Be3
      • 2.Qd3#
      • 2.Qb1#
    • 1...Bxg5+
      • 2.Sxg5#
  • Tries
    • 1.Re3+?
      • 1...Bxe3
        • 2.Qd3#
        • 2.Qb1#
      • 1...Qxe3!
  • Keys
    • 1.Bd2!
      • threat
        • 2.Sg5#
      • 1...Qh1+
        • 2.Qxh1#
      • 1...Qe3+
        • 2.Rxe3#
      • 1...Qf4+
        • 2.Qxf4#
      • 1...Rxf6+
        • 2.Sxf6#
      • 1...Bxd2+
        • 2.Sxd2#
      • 1...Rxc4
        • 2.Qxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 8
  • Sets
    • Q(c);CHECK,OGATEB::QAB(A),XQ(c)
    • Q(c);N_GUARD::QAB1(A)
    • Q(c);N_GUARD::QAB1(A),XQ(c)
    • R(g);N_PINP(H),OGATE,XP(E)::QAR2(A),XR(g)
    • R(g);N_GUARD,N_PINP(H)::S(B),XR(g)
    • R(g);N_GUARD::S(B)
    • R(g);CHECK,XP(H)::S(J),XR(g)
    • B(a);N_GUARD::S(B),XB(a)
    • B(a);CHECK,XB(G)::S(J),XB(a)
  • Tries
    • Try
      • R(C);CHECK,N_SPINB(G)
      • Refutation
        • Q(c);P_PINB(G),XR(C)
  • Actual
    • B(G);
    • Threat
      • S(J)
    • Vars
      • Q(c);CHECK,OGATEB::QAB(A),XQ(c)
      • Q(c);CHECK,N_GUARD,N_PINB(G)::R1(C),XQ(c)
      • Q(c);CHECK,N_PINB(G),OGATE::QAR1(A),XQ(c)
      • R(g);CHECK,XP(H)::S(J),XR(g)
      • B(a);CHECK,XB(G)::S(B),XB(a)
      • R(g);N_PINP(H),OGATE,XP(E)::QAR2(A),XR(g)
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Developed and maintained by Brian Stephenson.
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