MESON Chess Problem Database

Problem Display
PID: 97942 (1r6/1B6/2p5/n3P3/2PNk1P1/2K2N1P/4p1p1/2B1Q1nr w - - 0 1)

Hermanson, Halvar

US Problem Bulletin, 1982

1r6/1B6/2p5/n3P3/2PNk1P1/2K2N1P/4p1p1/2B1Q1nr

#2

10 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sxf3
      • 2.Qxe2#
    • 1...Sxh3
      • 2.Qxe2#
    • 1...Sb3
      • 2.Bxc6#
    • 1...Sxc4
      • 2.Bxc6#
  • Tries
    • 1.Sxc6?
      • threat
        • 2.Sg5#
      • 1...Kxf3
        • 2.Sd4#
      • 1...Sxf3
        • 2.Qxe2#
      • 1...Sxh3
        • 2.Qxe2#
      • 1...Sxc4
        • 2.Sxb8#
      • 1...Sxc6
        • 2.Bxc6#
      • 1...Rg8
        • 2.Sxa5#
      • 1...Rxh3!
    • 1.Se6?
      • threat
        • 2.Seg5#
      • 1...Kxf3
        • 2.Sg5#
      • 1...Sxf3
        • 2.Qxe2#
      • 1...Sxh3
        • 2.Qxe2#
      • 1...Sxc4
        • 2.Bxc6#
      • 1...Rg8!
    • 1.Bd2?
      • threat
        • 2.Qb1#
      • 1...Sxf3
        • 2.Qxe2#
      • 1...Sxh3
        • 2.Qxe2#
      • 1...Sxc4
        • 2.Bxc6#
      • 1...Rxb7!
    • 1.Bg5?
      • threat
        • 2.Qb1#
      • 1...Sxf3
        • 2.Qxe2#
      • 1...Sxh3
        • 2.Qxe2#
      • 1...Sxc4
        • 2.Bxc6#
      • 1...Rxb7!
    • 1.Bh6?
      • threat
        • 2.Qb1#
      • 1...Sxf3
        • 2.Qxe2#
      • 1...Sxh3
        • 2.Qxe2#
      • 1...Sxc4
        • 2.Bxc6#
      • 1...Rxb7!
  • Keys
    • 1.Sxe2!
      • threat
        • 2.Sexg1#
      • 1...Sxe2+
        • 2.Qxe2#
      • 1...Kxf3
        • 2.Sd4#
      • 1...Sxf3
        • 2.Sg3#
      • 1...Sxh3
        • 2.Seg1#
      • 1...Sxc4
        • 2.Bxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • S(a);N_GUARD,XS(D)::QAR2(B),XP(c)
    • S(a);N_GUARD,XP(E)::QAR2(B),XP(c)
    • S(f);N_GUARD::B(J),XP(g)
    • S(f);N_GUARD,XP(F)::B(J),XP(g)
  • Tries
    • Try
      • S(G);XP(g)
      • Threat
        • S(D)
      • Vars
        • K(e);N_SPINP(c),S_FLIGHT,XS(D)::B(J)+S(G),DCHECK
        • S(a);N_GUARD,XS(D)::QAR2(B),XP(c)
        • S(a);N_GUARD,XP(E)::QAR2(B),XP(c)
        • S(f);N_GUARD,XP(F)::B(J)+S(G),XR(h)
        • S(f);OGATE,P_SPINS(f),XS(G)::B(J),XS(f)
        • R(h);N_GUARD::B(J)+S(G),XS(f)
      • Refutation
        • R(b);P_PINS(D),XP(E)
    • Try
      • S(G);
      • Threat
        • S(G)
      • Vars
        • K(e);N_SPINP(c),P_SPINP(g),S_FLIGHT,XS(D)::S(G)
        • S(a);N_GUARD,XS(D)::QAR2(B),XP(c)
        • S(a);N_GUARD,XP(E)::QAR2(B),XP(c)
        • S(f);N_GUARD,XP(F)::B(J),XP(g)
      • Refutation
        • R(h);
    • Try
      • B(A);
      • Threat
        • QAB(B)
      • Vars
        • S(a);N_GUARD,XS(D)::QAR2(B),XP(c)
        • S(a);N_GUARD,XP(E)::QAR2(B),XP(c)
        • S(f);N_GUARD,XP(F)::B(J),XP(g)
      • Refutation
        • R(h);XB(J)
    • Try
      • B(A);
      • Threat
        • QAB(B)
      • Vars
        • S(a);N_GUARD,XS(D)::QAR2(B),XP(c)
        • S(a);N_GUARD,XP(E)::QAR2(B),XP(c)
        • S(f);N_GUARD,XP(F)::B(J),XP(g)
      • Refutation
        • R(h);XB(J)
    • Try
      • B(A);
      • Threat
        • QAB(B)
      • Vars
        • S(a);N_GUARD,XS(D)::QAR2(B),XP(c)
        • S(a);N_GUARD,XP(E)::QAR2(B),XP(c)
        • S(f);N_GUARD,XP(F)::B(J),XP(g)
      • Refutation
        • R(h);XB(J)
  • Actual
    • S(G);P_PINP(g),XP(c)
    • Threat
      • QAR(B)+S(G),XS(a)
    • Vars
      • S(a);CHECK,OGATE,P_SPINS(a),XS(G)::QAR2(B),XS(a)
      • K(e);S_FLIGHT,XS(D)::S(G)
      • S(a);SBLOCK,XS(D)::QAR(B)+S(G),DCHECK
      • S(a);XP(E)::QAR(B)+S(G)
      • S(f);N_GUARD,XP(F)::B(J),XP(g)
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