MESON Chess Problem Database
Problem Display
PID: 109039 (1N6/p2p4/R2P4/pknQn1p1/3p2Rp/PP5K/8/8 w - - 0 1)
N'Ko, David
Apprenti Sorcier, 1994
#2
8 + 9
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Sd3
- 2.Qc4#
- 1...Sf3
- 2.Qc4#
- 1...Sc4
- 2.Qxc4#
- 1...Sxg4
- 2.Qc4#
- 1...Sc6
- 2.Qc4#
- 1...Sg6
- 2.Qc4#
- 1...Sf7
- 2.Qc4#
- 1...d3
- 2.a4#
- 1...a4
- 2.bxa4#
- 1...Sd3
- Tries
- 1.Kg2?
- 1...Sxg4
- 2.Qc4#
- 1...Sd3
- 2.Qc4#
- 1...Sf3
- 2.Qc4#
- 1...Sc4
- 2.Qxc4#
- 1...Sc6
- 2.Qc4#
- 1...Sg6
- 2.Qc4#
- 1...Sf7
- 2.Qc4#
- 1...d3
- 2.a4#
- 1...a4
- 2.bxa4#
- 1...h3+!
- 1...Sxg4
- 1.Rxd4?
- threat
- 2.a4#
- 1...Sc4
- 2.Qxc4#
- 1...a4
- 2.Rb4#
- 2.bxa4#
- 1...g4+!
- threat
- 1.Re4?
- 1...d3
- 2.a4#
- 1...Sd3
- 2.Qc4#
- 1...Sf3
- 2.Qc4#
- 1...Sc4
- 2.Qxc4#
- 1...Sg4
- 2.Qc4#
- 1...Sc6
- 2.Qc4#
- 1...Sg6
- 2.Qc4#
- 1...Sf7
- 2.Qc4#
- 1...a4
- 2.bxa4#
- 1...g4+!
- 1...d3
- 1.Rxg5?
- 1...Sd3
- 2.Qc4#
- 2.Qb7#
- 1...Sf3
- 2.Qc4#
- 2.Qb7#
- 2.Qxc5#
- 1...Sc4
- 2.Qxc4#
- 2.Qxc5#
- 1...Sg4
- 2.Qc4#
- 2.Qb7#
- 2.Qxc5#
- 1...Sc6
- 2.Qc4#
- 2.Qxc5#
- 1...Sg6
- 2.Qc4#
- 2.Qb7#
- 2.Qxc5#
- 1...Sf7
- 2.Qc4#
- 2.Qb7#
- 2.Qxc5#
- 1...a4
- 2.bxa4#
- 1...d3!
- 1...Sd3
- 1.Rxa5+?
- 1...Kxa5
- 2.Qxc5#
- 1...Kb6!
- 1...Kxa5
- 1.Qxe5?
- 1...d3
- 2.a4#
- 1...a4!
- 1...d3
- 1.Kg2?
- Keys
- 1.Qxd4!
- 1...Sxb3
- 2.a4#
- 1...Sxa6
- 2.a4#
- 1...Sxg4
- 2.Qc4#
- 1...Scd3
- 2.a4#
- 1...Sa4
- 2.bxa4#
- 1...Se4
- 2.a4#
- 1...Se6
- 2.a4#
- 1...Sb7
- 2.a4#
- 1...Sed3
- 2.Qc4#
- 1...Sf3
- 2.Qc4#
- 1...Sc4
- 2.Qxc4#
- 1...Sc6
- 2.Qc4#
- 1...Sg6
- 2.Qc4#
- 1...Sf7
- 2.Qc4#
- 1...a4
- 2.Qb4#
- 1...Sxb3
- 1.Qxd4!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 7
- REMOVED MATES = 1
- Sets
- S(f);N_GUARD::QAB1(E)
- S(f);N_GUARD::QAB1(E),XS(f)
- S(f);N_GUARD,XR(D)::QAB1(E)
- P(a);::P(A)
- P(c);OGATE::P(B),XP(c)
- Tries
- Try
- K(C);S_FLIGHT
- Vars
- S(f);N_GUARD,XR(D)::QAB1(E)
- S(f);N_GUARD::QAB1(E)
- S(f);N_GUARD::QAB1(E),XS(f)
- P(a);::P(A)
- P(c);OGATE::P(B),XP(c)
- Refutation
- P(b);CHECK
- Try
- R(D);XP(a)
- Threat
- P(A)
- Vars
- S(f);N_GUARD::QAB1(E),XS(f)
- Refutation
- P(g);CHECK
- Try
- R(D);
- Vars
- P(a);::P(A)
- S(f);N_GUARD::QAB1(E)
- S(f);N_GUARD::QAB1(E),XS(f)
- P(c);OGATE::P(B),XP(c)
- Refutation
- P(g);CHECK
- Try
- R(D);XP(g)
- Vars
- P(c);OGATE::P(B),XP(c)
- Refutation
- P(a);
- Try
- R(F);CHECK,XP(c)
- Vars
- K(d);P-FLIGHT,XR(F)::QAR2(E),XS(e)
- Refutation
- K(d);N_SPINS(e),P-FLIGHT
- Try
- Q(E);XS(f)
- Vars
- P(a);::P(A)
- Refutation
- P(c);
- Try
- Actual
- Q(E);N_PINS(e),XP(a)
- Vars
- S(e);N_GUARD,XP(B)::P(A)
- S(e);N_GUARD,XR(F)::P(A)
- S(f);N_GUARD,XR(D)::QAB1(E)
- S(e);N_GUARD::P(A)
- S(e);OGATE::P(B),XS(e)
- S(f);N_GUARD::QAB1(E)
- S(f);N_GUARD::QAB1(E),XS(f)
- P(c);N_GUARD::QAR1(E)
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