MESON Chess Problem Database

Problem Display
PID: 99175 (bq6/3pN3/n2Q4/r6p/1p1Bk3/3pP2K/2R3PP/bB2Nr2 w - - 0 1)

Hermanson, Halvar

Magyar Sakkelet, 1971

bq6/3pN3/n2Q4/r6p/1p1Bk3/3pP2K/2R3PP/bB2Nr2

#2

10 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rf3+
      • 2.gxf3#
    • 1...Bxd4
      • 2.Qxd4#
    • 1...dxc2
      • 2.Bxc2#
    • 1...d2
      • 2.Rc1#
      • 2.Ra2#
      • 2.Rb2#
      • 2.Rxd2#
      • 2.Rc3#
      • 2.Rc4#
      • 2.Rc5#
      • 2.Rc6#
      • 2.Rc7#
      • 2.Rc8#
  • Tries
    • 1.Rc5?
      • threat
        • 2.Bxd3#
      • 1...Rf3+
        • 2.gxf3#
      • 1...Rxe1
        • 2.Qg6#
      • 1...Bxd4
        • 2.Qxd4#
      • 1...Qb5
        • 2.Qe5#
      • 1...Ra3
        • 2.Re5#
      • 1...Sxc5!
    • 1.Rc7?
      • threat
        • 2.Bxd3#
      • 1...Rf3+
        • 2.gxf3#
      • 1...Rxe1
        • 2.Qf4#
      • 1...Bxd4
        • 2.Qxd4#
      • 1...Ra3
        • 2.Qe5#
      • 1...Sc5
        • 2.Qe5#
      • 1...Qb5!
  • Keys
    • 1.Rf2!
      • threat
        • 2.Bxd3#
      • 1...Rxe1
        • 2.Rf4#
      • 1...Bxd4
        • 2.Qxd4#
      • 1...Qb5
        • 2.Qf4#
      • 1...Ra3
        • 2.Qg6#
      • 1...Sc5
        • 2.Qg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • R(b);CHECK,OGATE::P(D),XR(b)
    • B(a);OGATE,XB(H)::QAR1(I),XB(a)
    • P(c);OGATE,P_SPINP(c),XR(C)::B(A),XP(c)
  • Tries
    • Try
      • R(C);P_PINP(c)
      • Threat
        • B(A),XP(c)
      • Vars
        • R(b);CHECK,OGATE::P(D),XR(b)
        • R(b);N_GUARD,XS(B)::QAB(I)
        • B(a);OGATE,XB(H)::QAR1(I),XB(a)
        • Q(k);N_GUARD::QAR1(I)
        • R(f);N_GUARD::R1(C)
      • Refutation
        • S(h);XR(C)
    • Try
      • R(C);P_PINP(c)
      • Threat
        • B(A),XP(c)
      • Vars
        • R(b);CHECK,OGATE::P(D),XR(b)
        • R(b);N_GUARD,XS(B)::QAR1(I)
        • B(a);OGATE,XB(H)::QAR1(I),XB(a)
        • R(f);N_GUARD::QAR1(I)
        • S(h);S_CUTR(f)::QAR1(I)
      • Refutation
        • Q(k);
  • Actual
    • R(C);P_PINP(c)
    • Threat
      • B(A),XP(c)
    • Vars
      • R(b);N_GUARD,XS(B)::R1(C)
      • B(a);OGATE,XB(H)::QAR1(I),XB(a)
      • Q(k);N_GUARD::QAR1(I)
      • R(f);N_GUARD::QAB(I)
      • S(h);S_CUTR(f)::QAB(I)
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