MESON Chess Problem Database
Problem Display
PID: 202275 (2R5/4R3/3p2KQ/2nkp3/r1n5/2PP4/2N1P3/8 w - - 0 1)
Lucio, Ther
American Chess Bulletin, 1923
#2
8 + 6
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Ra1
- 2.Sb4#
- 1...Ra2
- 2.Sb4#
- 1...Ra3
- 2.Sb4#
- 1...Rb4
- 2.Sxb4#
- 1...Ra5
- 2.Sb4#
- 1...Ra6
- 2.Sb4#
- 1...Ra7
- 2.Sb4#
- 1...Ra8
- 2.Sb4#
- 1...Sb2
- 2.Se3#
- 1...Sd2
- 2.Se3#
- 1...Sa3
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Sa5
- 2.Se3#
- 1...Sb6
- 2.Se3#
- 1...Sb3
- 2.e4#
- 1...Sa6
- 2.e4#
- 1...Se6
- 2.e4#
- 1...Sb7
- 2.e4#
- 1...Sd7
- 2.e4#
- 1...Ra1
- Tries
- 1.Kf5?
- 1...Se3+
- 2.Sxe3#
- 1...Sxd3
- 2.Qe6#
- 2.e4#
- 1...Ra1
- 2.Sb4#
- 1...Ra2
- 2.Sb4#
- 1...Ra3
- 2.Sb4#
- 1...Rb4
- 2.Sxb4#
- 1...Ra5
- 2.Sb4#
- 1...Ra6
- 2.Sb4#
- 1...Ra7
- 2.Sb4#
- 1...Ra8
- 2.Sb4#
- 1...Sb2
- 2.Se3#
- 1...Sd2
- 2.Se3#
- 1...Sa3
- 2.Se3#
- 1...Sa5
- 2.Se3#
- 1...Sb6
- 2.Se3#
- 1...Sb3
- 2.Qe6#
- 2.e4#
- 1...Se4
- 2.Qe6#
- 2.dxe4#
- 1...Sa6
- 2.Qe6#
- 2.e4#
- 1...Se6
- 2.Qxe6#
- 2.e4#
- 1...Sb7
- 2.Qe6#
- 2.e4#
- 1...Sd7
- 2.Qe6#
- 2.e4#
- 1...e4!
- 1...Se3+
- 1.Qg7?
- 1...e4
- 2.Qd4#
- 1...Ra1
- 2.Sb4#
- 1...Ra2
- 2.Sb4#
- 1...Ra3
- 2.Sb4#
- 1...Rb4
- 2.Sxb4#
- 1...Ra5
- 2.Sb4#
- 1...Ra6
- 2.Sb4#
- 1...Ra7
- 2.Sb4#
- 1...Ra8
- 2.Sb4#
- 1...Sb2
- 2.Se3#
- 1...Sd2
- 2.Se3#
- 1...Sa3
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Sa5
- 2.Se3#
- 1...Sb6
- 2.Se3#
- 1...Sb3
- 2.Qf7#
- 2.Qg8#
- 2.e4#
- 1...Se4
- 2.Qf7#
- 2.Qg8#
- 1...Sa6
- 2.Qf7#
- 2.Qg8#
- 2.e4#
- 1...Se6
- 2.e4#
- 1...Sb7
- 2.Qf7#
- 2.Qg8#
- 2.e4#
- 1...Sd7
- 2.Qf7#
- 2.Qg8#
- 2.e4#
- 1...Sxd3!
- 1...e4
- 1.Qh1+?
- 1...Se4
- 2.Qxe4#
- 2.dxe4#
- 1...e4!
- 1...Se4
- 1.Qh3?
- 1...Sxd3
- 2.Qxd3#
- 1...Ra1
- 2.Sb4#
- 1...Ra2
- 2.Sb4#
- 1...Ra3
- 2.Sb4#
- 1...Rb4
- 2.Sxb4#
- 1...Ra5
- 2.Sb4#
- 1...Ra6
- 2.Sb4#
- 1...Ra7
- 2.Sb4#
- 1...Ra8
- 2.Sb4#
- 1...Sb2
- 2.Se3#
- 1...Sd2
- 2.Se3#
- 1...Sa3
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Sa5
- 2.Se3#
- 1...Sb6
- 2.Se3#
- 1...Sb3
- 2.Qe6#
- 2.e4#
- 1...Se4
- 2.Qe6#
- 1...Sa6
- 2.Qe6#
- 2.e4#
- 1...Se6
- 2.Qxe6#
- 2.e4#
- 1...Sb7
- 2.Qe6#
- 2.e4#
- 1...Sd7
- 2.Qe6#
- 2.e4#
- 1...e4!
- 1...Sxd3
- 1.Qh4?
- 1...Sxd3
- 2.e4#
- 1...Ra1
- 2.Sb4#
- 2.Qxc4#
- 2.dxc4#
- 1...Ra2
- 2.Sb4#
- 2.Qxc4#
- 2.dxc4#
- 1...Ra3
- 2.Sb4#
- 2.Qxc4#
- 2.dxc4#
- 1...Rb4
- 2.Sxb4#
- 1...Ra5
- 2.Sb4#
- 2.Qxc4#
- 2.dxc4#
- 1...Ra6
- 2.Sb4#
- 2.Qxc4#
- 2.dxc4#
- 1...Ra7
- 2.Sb4#
- 2.Qxc4#
- 2.dxc4#
- 1...Ra8
- 2.Sb4#
- 2.Qxc4#
- 2.dxc4#
- 1...Sb2
- 2.Se3#
- 1...Sd2
- 2.Se3#
- 1...Sa3
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Sa5
- 2.Se3#
- 1...Sb6
- 2.Se3#
- 1...Sb3
- 2.Qe4#
- 2.e4#
- 1...Se4
- 2.Qxe4#
- 2.dxe4#
- 1...Sa6
- 2.Qe4#
- 2.e4#
- 1...Se6
- 2.Qe4#
- 2.e4#
- 1...Sb7
- 2.Qe4#
- 2.e4#
- 1...Sd7
- 2.Qe4#
- 2.e4#
- 1...e4!
- 1...Sxd3
- 1.Qh8?
- 1...e4
- 2.Qd4#
- 1...Ra1
- 2.Sb4#
- 1...Ra2
- 2.Sb4#
- 1...Ra3
- 2.Sb4#
- 1...Rb4
- 2.Sxb4#
- 1...Ra5
- 2.Sb4#
- 1...Ra6
- 2.Sb4#
- 1...Ra7
- 2.Sb4#
- 1...Ra8
- 2.Sb4#
- 1...Sb2
- 2.Se3#
- 1...Sd2
- 2.Se3#
- 1...Sa3
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Sa5
- 2.Se3#
- 1...Sb6
- 2.Se3#
- 1...Sb3
- 2.Qg8#
- 2.e4#
- 1...Se4
- 2.Qg8#
- 1...Sa6
- 2.Qg8#
- 2.e4#
- 1...Se6
- 2.e4#
- 1...Sb7
- 2.Qg8#
- 2.e4#
- 1...Sd7
- 2.Qg8#
- 2.e4#
- 1...Sxd3!
- 1...e4
- 1.Kf5?
- Keys
- 1.Qd2!
- 1...Sxd2
- 2.Se3#
- 1...Sxd3
- 2.Qxd3#
- 1...e4
- 2.dxe4#
- 1...Ra1
- 2.Sb4#
- 1...Ra2
- 2.Sb4#
- 1...Ra3
- 2.Sb4#
- 1...Rb4
- 2.Sxb4#
- 1...Ra5
- 2.Sb4#
- 1...Ra6
- 2.Sb4#
- 1...Ra7
- 2.Sb4#
- 1...Ra8
- 2.Sb4#
- 1...Sb2
- 2.Se3#
- 1...Sa3
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Sa5
- 2.Se3#
- 1...Sb6
- 2.Se3#
- 1...Sb3
- 2.e4#
- 1...Se4
- 2.dxc4#
- 1...Sa6
- 2.e4#
- 1...Se6
- 2.e4#
- 1...Sb7
- 2.e4#
- 1...Sd7
- 2.e4#
- 1...Sxd2
- 1.Qd2!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 0
- Sets
- R(a);N_GUARD::S(A)
- R(a);N_GUARD::S(A),XR(a)
- S(b);N_GUARD::S(A)
- S(b);N_GUARD::S(A),XS(b)
- S(c);N_GUARD::P(B)
- Tries
- Try
- K(E);S_FLIGHT
- Vars
- S(b);CHECK,N_GUARD::S(A),XS(b)
- R(a);N_GUARD::S(A)
- R(a);N_GUARD::S(A),XR(a)
- S(b);N_GUARD::S(A)
- Refutation
- P(e);
- Try
- Q(F);
- Vars
- P(e);OGATE::QAR1(F)
- R(a);N_GUARD::S(A)
- R(a);N_GUARD::S(A),XR(a)
- S(b);N_GUARD::S(A)
- S(b);N_GUARD::S(A),XS(b)
- S(c);N_GUARD::P(B)
- Refutation
- S(c);XP(D)
- Try
- Q(F);CHECK
- Refutation
- P(e);P_SPINP(e)
- Try
- Q(F);
- Vars
- S(c);OGATE,XP(D)::QAR2(F),XS(c)
- R(a);N_GUARD::S(A)
- R(a);N_GUARD::S(A),XR(a)
- S(b);N_GUARD::S(A)
- S(b);N_GUARD::S(A),XS(b)
- S(c);N_GUARD::QAB1(F)
- Refutation
- P(e);
- Try
- Q(F);
- Vars
- S(c);N_GUARD,XP(D)::P(B)
- R(a);N_GUARD::S(A),XR(a)
- S(b);N_GUARD::S(A)
- S(b);N_GUARD::S(A),XS(b)
- Refutation
- P(e);
- Try
- Q(F);
- Vars
- P(e);OGATE::QAR1(F)
- R(a);N_GUARD::S(A)
- R(a);N_GUARD::S(A),XR(a)
- S(b);N_GUARD::S(A)
- S(b);N_GUARD::S(A),XS(b)
- S(c);N_GUARD::QAB(F)
- S(c);N_GUARD::P(B)
- Refutation
- S(c);XP(D)
- Try
- Actual
- Q(F);
- Vars
- S(b);N_GUARD,XQ(F)::S(A)
- S(c);OGATE,P_SPINS(c),XP(D)::QAR2(F),XS(c)
- P(e);OGATE::QAR(F)+P(D)DCHECK,XP(e)
- R(a);N_GUARD::S(A)
- R(a);N_GUARD::S(A),XR(a)
- S(b);N_GUARD::S(A)
- S(b);N_GUARD::S(A),XS(b)
- S(c);N_GUARD::P(B)
- S(c);SBLOCK::QAR(F)+P(D)DCHECK,XS(b)
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