MESON Chess Problem Database

Problem Display
PID: 239513 (2B3r1/2p1p3/3p4/3NkP2/1N1n2p1/3K2n1/4PR2/7Q w - - 0 1)

Hermanson, Halvar

Magyar Sakkelet, 1961

2B3r1/2p1p3/3p4/3NkP2/1N1n2p1/3K2n1/4PR2/7Q

#2

8 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rh8
      • 2.Qxh8#
    • 1...Sf1
      • 2.Qe4#
    • 1...Sgxe2
      • 2.Qe4#
    • 1...Se4
      • 2.Qxe4#
    • 1...Sgxf5
      • 2.Qe4#
    • 1...Sh5
      • 2.Qe4#
    • 1...Sc2
      • 2.Sc6#
    • 1...Sdxe2
      • 2.Sc6#
    • 1...Sb3
      • 2.Sc6#
    • 1...Sb5
      • 2.Sc6#
    • 1...Sdxf5
      • 2.Sc6#
    • 1...Sc6
      • 2.Sxc6#
    • 1...Se6
      • 2.Sc6#
  • Tries
    • 1.Qa1?
      • threat
        • 2.Qxd4#
      • 1...Sxe2
        • 2.Rxe2#
      • 1...Sxf5
        • 2.Rxf5#
      • 1...c5!
    • 1.Qh2?
      • threat
        • 2.Qxg3#
      • 1...Sxe2
        • 2.Rxe2#
      • 1...Sxf5
        • 2.Rxf5#
      • 1...Se6!
    • 1.Qh6?
      • threat
        • 2.Qf4#
      • 1...Sgxe2
        • 2.Qe3#
      • 1...Sdxe2
        • 2.Qe6#
      • 1...Sh5
        • 2.Qe3#
      • 1...Se6
        • 2.Qxe6#
      • 1...Rg5!
    • 1.Qh8+?
      • 1...Rg7
        • 2.Qxg7#
      • 1...Rxh8!
  • Keys
    • 1.Qg2!
      • threat
        • 2.Qxg3#
      • 1...Sgxe2
        • 2.Qe4#
      • 1...Sgxf5
        • 2.Qe4#
      • 1...Sdxe2
        • 2.Sc6#
      • 1...Sdxf5
        • 2.Sc6#
      • 1...Sf1
        • 2.Qe4#
      • 1...Sh1
        • 2.Qe4#
      • 1...Se4
        • 2.Qxe4#
      • 1...Sh5
        • 2.Qe4#
      • 1...Se6
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • R(h);N_GUARD::QAB(A),XR(h)
    • S(a);N_GUARD::QAR1(A)
    • S(a);N_GUARD,XP(B)::QAR1(A)
    • S(a);N_GUARD::QAR1(A),XS(a)
    • S(a);N_GUARD,XP(G)::QAR1(A)
    • S(b);N_GUARD::S(E)
    • S(b);N_GUARD,XP(B)::S(E)
    • S(b);N_GUARD,XP(G)::S(E)
    • S(b);N_GUARD::S(E),XS(b)
  • Tries
    • Try
      • Q(A);P_PINS(b)
      • Threat
        • QAB1(A),XS(b)
      • Vars
        • S(a);OGATE,XP(B)::R(C),XS(a)
        • S(a);OGATE,XP(G)::R1(C),XS(a)
      • Refutation
        • P(f);
    • Try
      • Q(A);P_PINS(a)
      • Threat
        • QAB(A),XS(a)
      • Vars
        • S(b);OGATE,XP(B)::R(C),XS(b)
        • S(b);OGATE,XP(G)::R1(C),XS(b)
      • Refutation
        • S(b);
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • S(a);N_GUARD,XP(B)::QAR2(A)
        • S(b);N_GUARD,XP(B)::QAR1(A)
        • S(a);N_GUARD::QAR2(A)
        • S(b);N_GUARD::QAR1(A),XS(b)
      • Refutation
        • R(h);
    • Try
      • Q(A);CHECK
      • Vars
        • R(h);N_GUARD,P_SPINR(h)::QAB(A),XR(h)
      • Refutation
        • R(h);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAB(A),XS(a)
    • Vars
      • S(a);N_GUARD,XP(B)::QAR1(A)
      • S(a);N_GUARD,XP(G)::QAR1(A)
      • S(b);N_GUARD,XP(B)::S(E)
      • S(b);N_GUARD,XP(G)::S(E)
      • S(a);N_GUARD::QAR1(A)
      • S(a);N_GUARD::QAR1(A),XS(a)
      • S(b);N_GUARD::S(E)
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