MESON Chess Problem Database
Problem Display
PID: 135587 (4n2K/4B3/8/4kpN1/8/2N2p2/2nQ1P2/8 w - - 0 1)
Challenger, Alfred Clement
The Field, 1916
(First published on Sat Mar 18 1916)
#2
6 + 5
SOLUTION
- SOUND
- Sets
- 1...Sa1
- 2.Qe3#
- 1...Se1
- 2.Qe3#
- 1...Sa3
- 2.Qe3#
- 1...Se3
- 2.Qxe3#
- 1...Sb4
- 2.Qe3#
- 1...Sd4
- 2.Qe3#
- 1...Sd6
- 2.Qxd6#
- 1...Sf6
- 2.Bd6#
- 2.Qd6#
- 1...Sc7
- 2.Qd6#
- 1...Sg7
- 2.Qd6#
- 1...f4
- 2.Qd5#
- 1...Sa1
- Tries
- 1.Kh7?
- 1...Se3
- 2.Qxe3#
- 1...f4
- 2.Qd5#
- 1...Sa1
- 2.Qe3#
- 1...Se1
- 2.Qe3#
- 1...Sa3
- 2.Qe3#
- 1...Sb4
- 2.Qe3#
- 1...Sd4
- 2.Qe3#
- 1...Sd6
- 2.Qxd6#
- 1...Sc7
- 2.Qd6#
- 1...Sg7
- 2.Qd6#
- 1...Sf6+!
- 1...Se3
- 1.Kg8?
- 1...Se3
- 2.Qxe3#
- 1...f4
- 2.Qd5#
- 1...Sa1
- 2.Qe3#
- 1...Se1
- 2.Qe3#
- 1...Sa3
- 2.Qe3#
- 1...Sb4
- 2.Qe3#
- 1...Sd4
- 2.Qe3#
- 1...Sd6
- 2.Qxd6#
- 1...Sc7
- 2.Qd6#
- 1...Sg7
- 2.Qd6#
- 1...Sf6+!
- 1...Se3
- 1.Sb5?
- 1...Se3
- 2.Qd4#
- 1...Sd4
- 2.Qxd4#
- 1...Sa1
- 2.Qd4#
- 1...Se1
- 2.Qd4#
- 1...Sa3
- 2.Qd4#
- 1...Sb4
- 2.Qd4#
- 1...Sd6
- 2.Qxd6#
- 1...Sf6
- 2.Bd6#
- 2.Qd6#
- 1...Sc7
- 2.Qd6#
- 1...Sg7
- 2.Qd6#
- 1...f4!
- 1...Se3
- 1.Sh3?
- threat
- 2.Qd5#
- 1...Se3
- 2.Qxe3#
- 1...Sb4
- 2.Qe3#
- 1...Sd4
- 2.Qe3#
- 1...Sf6
- 2.Qd6#
- 1...Sc7
- 2.Qd6#
- 1...Ke6!
- threat
- 1.Se6?
- threat
- 2.Qd5#
- 1...Se3
- 2.Qxe3#
- 1...Sb4
- 2.Qe1#
- 2.Qe3#
- 1...Sd4
- 2.Qe3#
- 1...Sf6
- 2.Qd6#
- 1...Sc7
- 2.Qd6#
- 1...Kxe6!
- threat
- 1.Sh7?
- 1...Se3
- 2.Qxe3#
- 1...f4
- 2.Qd5#
- 1...Sa1
- 2.Qe3#
- 1...Se1
- 2.Qe3#
- 1...Sa3
- 2.Qe3#
- 1...Sb4
- 2.Qe3#
- 1...Sd4
- 2.Qe3#
- 1...Sd6
- 2.Qxd6#
- 1...Sf6
- 2.Qd6#
- 1...Sc7
- 2.Qd6#
- 1...Sg7
- 2.Qd6#
- 1...Ke6!
- 1...Se3
- 1.Qd3?
- 1...Sa1
- 2.Qe3#
- 1...Se1
- 2.Qe3#
- 1...Sa3
- 2.Qe3#
- 1...Se3
- 2.Qxe3#
- 1...Sb4
- 2.Qe3#
- 1...Sd4
- 2.Qe3#
- 1...Sd6
- 2.Qxd6#
- 1...Sf6
- 2.Bd6#
- 2.Qd6#
- 1...Sc7
- 2.Qd6#
- 1...Sg7
- 2.Qd6#
- 1...f4
- 2.Qe4#
- 2.Qd5#
- 1...Kf4!
- 1...Sa1
- 1.Kh7?
- Keys
- 1.Se2!
- threat
- 2.Qa5#
- 1...fxe2
- 2.f4#
- 1...Sd4
- 2.Qxd4#
- 1...Sa3
- 2.Qd4#
- 1...Se3
- 2.Qd4#
- 1...Sb4
- 2.Qd4#
- 1...Sd6
- 2.Qxd6#
- 1...Sf6
- 2.Bd6#
- 2.Qd6#
- 1...Sc7
- 2.Qd6#
- threat
- 1.Se2!
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 4
- ADDED MATES = 1
- REMOVED MATES = 4
- Sets
- S(a);N_GUARD::QAR2(A)
- S(a);N_GUARD::QAR2(A),XS(a)
- S(e);N_GUARD::QAB1(A),XS(e)
- S(e);N_GUARD::QAB1(A)
- P(d);SBLOCK::QAR1(A)
- Tries
- Try
- K(F);P-FLIGHT
- Vars
- S(a);N_GUARD::QAR2(A),XS(a)
- P(d);SBLOCK::QAR1(A)
- S(a);N_GUARD::QAR2(A)
- S(e);N_GUARD::QAB1(A),XS(e)
- S(e);N_GUARD::QAB1(A)
- Refutation
- S(e);CHECK
- Try
- K(F);P-FLIGHT
- Vars
- S(a);N_GUARD::QAR2(A),XS(a)
- P(d);SBLOCK::QAR1(A)
- S(a);N_GUARD::QAR2(A)
- S(e);N_GUARD::QAB1(A),XS(e)
- S(e);N_GUARD::QAB1(A)
- Refutation
- S(e);CHECK
- Try
- S(C);
- Vars
- S(a);N_GUARD::QAB1(A)
- S(a);N_GUARD::QAB1(A),XS(a)
- S(e);N_GUARD::QAB1(A),XS(e)
- S(e);N_GUARD::QAB1(A)
- Refutation
- P(d);
- Try
- S(D);
- Threat
- QAR1(A)
- Vars
- S(a);N_GUARD::QAR2(A),XS(a)
- S(a);N_GUARD::QAR2(A)
- S(e);N_GUARD::QAB1(A)
- Refutation
- K(c);P-FLIGHT
- Try
- S(D);
- Threat
- QAR1(A)
- Vars
- S(a);N_GUARD::QAR2(A),XS(a)
- S(a);N_GUARD::QAR2(A)
- S(e);N_GUARD::QAB1(A)
- Refutation
- K(c);P-FLIGHT,XS(D)
- Try
- S(D);
- Vars
- S(a);N_GUARD::QAR2(A),XS(a)
- P(d);SBLOCK::QAR1(A)
- S(a);N_GUARD::QAR2(A)
- S(e);N_GUARD::QAB1(A),XS(e)
- S(e);N_GUARD::QAB1(A)
- Refutation
- K(c);P-FLIGHT
- Try
- Q(A);
- Vars
- S(a);N_GUARD::QAR2(A)
- S(a);N_GUARD::QAR2(A),XS(a)
- S(e);N_GUARD::QAB1(A),XS(e)
- S(e);N_GUARD::QAB1(A)
- Refutation
- K(c);S_FLIGHT
- Try
- Actual
- S(C);
- Threat
- QAR(A)
- Vars
- P(b);OGATE,XS(C)::P(B)
- S(a);N_GUARD::QAB1(A),XS(a)
- S(a);N_GUARD::QAB1(A)
- S(e);N_GUARD::QAB1(A),XS(e)
- S(e);N_GUARD::QAB1(A)
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