MESON Chess Problem Database

Problem Display
PID: 238083 (8/p1rp2p1/b5n1/B5Q1/2Nkp3/pB5R/r1R4K/b3N3 w - - 0 1)

Hermanson, Halvar

Norsk Sjakkblad, 1952

8/p1rp2p1/b5n1/B5Q1/2Nkp3/pB5R/r1R4K/b3N3

#2

8 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rb2
      • 2.Bc3#
    • 1...Rxc2+
      • 2.Sxc2#
    • 1...Rc5
      • 2.Qd2#
    • 1...Bb2
      • 2.Rd2#
    • 1...Bc3
      • 2.Bxc3#
    • 1...Sf4
      • 2.Qe5#
    • 1...Sh4
      • 2.Qe5#
    • 1...Se5
      • 2.Qxe5#
    • 1...Se7
      • 2.Qe5#
    • 1...Sf8
      • 2.Qe5#
    • 1...Sh8
      • 2.Qe5#
    • 1...d5
      • 2.Qe3#
  • Tries
    • 1.Sf3+?
      • 1...Kd3
        • 2.Qd2#
        • 2.Qe3#
      • 1...exf3!
    • 1.Bd2?
      • threat
        • 2.Be3#
      • 1...Rxc2
        • 2.Sxc2#
      • 1...Se5
        • 2.Qxe5#
      • 1...e3!
    • 1.Bb6+?
      • 1...Rc5
        • 2.Bxc5#
        • 2.Qd2#
        • 2.Qxc5#
      • 1...axb6!
    • 1.Rxa2?
      • threat
        • 2.Sc2#
        • 2.Rd2#
      • 1...Rxc4
        • 2.Rd2#
      • 1...Bxc4
        • 2.Sc2#
      • 1...Se5
        • 2.Qxe5#
      • 1...d5
        • 2.Qe3#
      • 1...Bb2
        • 2.Sc2#
      • 1...Bc3
        • 2.Sc2#
        • 2.Bxc3#
      • 1...Sf4
        • 2.Sc2#
        • 2.Qe5#
      • 1...e3!
  • Keys
    • 1.Sb2!
      • threat
        • 2.Qd5#
      • 1...Rxc2+
        • 2.Sxc2#
      • 1...Rc4
        • 2.Rd2#
      • 1...Rc5
        • 2.Qxc5#
      • 1...Bc4
        • 2.Bc3#
      • 1...Bb7
        • 2.Rd2#
      • 1...Sf4
        • 2.Qxg7#
      • 1...Se5
        • 2.Qe3#
      • 1...Se7
        • 2.Qxg7#
      • 1...d5
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 5
    • ADDED MATES = 4
    • REMOVED MATES = 7
  • Sets
    • R(b);S_CUTB(a)::B(G)
    • R(b);CHECK,XR(B)::S(A),XR(b)
    • R(i);SBLOCK::QAR2(H)
    • B(a);N_PINR(B),S_CUTR(b)::R(B)
    • B(a);N_GUARD::B(G),XB(a)
    • S(g);N_GUARD::QAB1(H)
    • S(g);N_GUARD::QAB1(H),XS(g)
    • P(j);SBLOCK::QAB1(H)
  • Tries
    • Try
      • S(A);CHECK
      • Refutation
        • P(e);XS(A)
    • Try
      • B(G);N_SPINR(B)
      • Threat
        • B(G)
      • Vars
        • R(b);P_PINB(G),XR(B)::S(A),XR(b)
        • S(g);N_GUARD::QAB1(H),XS(g)
      • Refutation
        • P(e);
    • Try
      • B(G);CHECK
      • Refutation
        • P(h);XB(G)
    • Try
      • R(B);N_SPINR(B),XR(b)
      • Threat
        • DUALS(2)
      • Vars
        • R(i);XS(F)::R(B)
        • B(f);XS(F)::S(A)
        • S(g);N_GUARD::QAB1(H),XS(g)
        • P(j);SBLOCK::QAB1(H)
        • B(a);::S(A)
      • Refutation
        • P(e);
  • Actual
    • S(F);N_SPINR(B)
    • Threat
      • QAR1(H)
    • Vars
      • R(i);CHECK,XR(B)::S(A),XR(i)
      • R(i);S_CUTB(f)::R(B)
      • R(i);N_GUARD::QAB1(H),XR(i)
      • B(f);S_CUTR(i)::B(G)
      • B(f);N_GUARD::R(B)
      • S(g);OGATE::QAB(H),XP(k)
      • S(g);SBLOCK::QAB1(H)
      • P(j);::QAR1(H),XP(j)
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