MESON Chess Problem Database

Problem Display
PID: 212640 (2n5/1Q5B/6r1/1p1pP3/1K1k2pr/4n3/2pNP2B/4N3 w - - 0 1)

Moser, Hans

Schach-Echo, 1961

2n5/1Q5B/6r1/1p1pP3/1K1k2pr/4n3/2pNP2B/4N3

#2

8 + 9

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rg5
      • 2.Sb3#
    • 1...Ra6
      • 2.Sb3#
    • 1...Rb6
      • 2.Sb3#
    • 1...Rc6
      • 2.Sb3#
    • 1...Rd6
      • 2.Sb3#
    • 1...Re6
      • 2.Sb3#
    • 1...Rf6
      • 2.Sb3#
    • 1...Rh6
      • 2.Sb3#
    • 1...Rg7
      • 2.Sb3#
    • 1...Rg8
      • 2.Sb3#
    • 1...Sd1
      • 2.Sxc2#
    • 1...Sf1
      • 2.Sxc2#
    • 1...Sg2
      • 2.Sxc2#
    • 1...Sc4
      • 2.Sxc2#
    • 1...Sf5
      • 2.Sxc2#
    • 1...Sd6
      • 2.Qb6#
      • 2.Qa7#
    • 1...g3
      • 2.Sef3#
  • Tries
    • 1.Qxb5?
      • threat
        • 2.Qd3#
        • 2.Qc5#
      • 1...Sc4
        • 2.Sxc2#
        • 2.Qc5#
      • 1...g3
        • 2.Sef3#
      • 1...c1Q
        • 2.Qd3#
      • 1...c1S
        • 2.Qc5#
      • 1...c1R
        • 2.Qd3#
      • 1...Rb6
        • 2.Sb3#
      • 1...Rc6
        • 2.Sb3#
        • 2.Qd3#
      • 1...Rxh2!
    • 1.Qb6+?
      • 1...Rxb6
        • 2.Sb3#
      • 1...Sxb6!
    • 1.Qa7+?
      • 1...Rb6
        • 2.Sb3#
        • 2.Qa1#
      • 1...Sb6
        • 2.Qa1#
      • 1...Sxa7!
  • Keys
    • 1.Qf7!
      • threat
        • 2.Qf4#
      • 1...Sg2
        • 2.Sxc2#
      • 1...Sf5
        • 2.Sxc2#
      • 1...g3
        • 2.Sef3#
      • 1...Rf6
        • 2.Sb3#
      • 1...Sd6
        • 2.Qa7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 12
  • Sets
    • R(h);::S(B)
    • S(b);N_GUARD::S(A),XP(a)
    • P(d);N_GUARD::S(A)
  • Tries
    • Try
      • Q(G);XP(f)
      • Threat
        • DUALS(2)
      • Vars
        • P(d);N_GUARD::S(A)
        • P(a);::QAR1(G)
        • P(a);::QAB1(G)
        • R(h);P_PINQ(G)::S(B)
      • Refutation
        • R(e);XB(D)
    • Try
      • Q(G);CHECK
      • Vars
        • R(h);XQ(G)::S(B)
      • Refutation
        • S(i);XQ(G)
    • Try
      • Q(G);CHECK
      • Vars
        • S(i);P_SPINS(i)::QAB(G)
      • Refutation
        • S(i);XQ(G)
  • Actual
    • Q(G);
    • Threat
      • QAR2(G)
    • Vars
      • S(b);N_GUARD::S(A),XP(a)
      • P(d);N_GUARD::S(A)
      • R(h);::S(B)
      • S(i);N_GUARD,S_CUTR(h)::QAB(G)
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