MESON Chess Problem Database
Problem Display
PID: 195803 (8/8/8/3K2p1/6Q1/4Nn1R/4pB1b/4n2k w - - 0 1)
Andrade, Barry Jack da Costa
The Observer, 1942
(First published on Sun Feb 8 1942)
#2
5 + 6
| 15239 | Valois Notebooks | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Sc2
- 2.Qxf3#
- 2.Qg2#
- 1...Sg2
- 2.Qxg2#
- 1...Sd3
- 2.Qxf3#
- 2.Qg2#
- 1...Sg1
- 2.Qxg1#
- 1...Sd2
- 2.Qg1#
- 1...Sd4
- 2.Qg1#
- 1...Sh4
- 2.Qg1#
- 1...Se5
- 2.Qg1#
- 1...Sc2
- Tries
- 1.Ke4?
- 1...Sc2
- 2.Qxf3#
- 2.Qg2#
- 1...Sg2
- 2.Qxg2#
- 1...Sd3
- 2.Qxf3#
- 2.Qg2#
- 1...Sg1
- 2.Qxg1#
- 1...Sd4
- 2.Qg1#
- 1...Sh4
- 2.Qg1#
- 1...Se5
- 2.Qg1#
- 1...Sd2+!
- 1...Sc2
- 1.Kc5?
- 1...Sc2
- 2.Qxf3#
- 2.Qg2#
- 1...Sg2
- 2.Qxg2#
- 1...Sg1
- 2.Qxg1#
- 1...Sd2
- 2.Qg1#
- 1...Sd4
- 2.Qg1#
- 1...Sh4
- 2.Qg1#
- 1...Se5
- 2.Qg1#
- 1...Sd3+!
- 1...Sc2
- 1.Ke6?
- 1...Sc2
- 2.Qxf3#
- 2.Qg2#
- 1...Sg2
- 2.Qxg2#
- 1...Sd3
- 2.Qxf3#
- 2.Qg2#
- 1...Sg1
- 2.Qxg1#
- 1...Sd2
- 2.Qg1#
- 1...Sh4
- 2.Qg1#
- 1...Se5
- 2.Qg1#
- 1...Sd4+!
- 1...Sc2
- 1.Sc2?
- 1...Sxc2
- 2.Qxf3#
- 1...Sd3
- 2.Qxf3#
- 1...Sg1
- 2.Qxg1#
- 1...Sd2
- 2.Qg1#
- 1...Sd4
- 2.Qg1#
- 1...Sh4
- 2.Qg1#
- 1...Se5
- 2.Qg1#
- 1...Sg2!
- 1...Sxc2
- 1.Sc4?
- 1...Sc2
- 2.Qxf3#
- 1...Sd3
- 2.Qxf3#
- 1...Sg1
- 2.Qxg1#
- 1...Sd2
- 2.Qg1#
- 1...Sd4
- 2.Qg1#
- 1...Sh4
- 2.Qg1#
- 1...Se5
- 2.Qg1#
- 1...Sg2!
- 1...Sc2
- 1.Bg1?
- 1...Sg2
- 2.Qxg2#
- 1...Sc2
- 2.Qg2#
- 1...Sd3
- 2.Qg2#
- 1...Sd2
- 2.Rxh2#
- 1...Sd4
- 2.Rxh2#
- 1...Sh4
- 2.Rxh2#
- 1...Se5
- 2.Rxh2#
- 1...Sxg1!
- 1...Sg2
- 1.Rxh2+?
- 1...Sxh2
- 2.Qg1#
- 1...Kxh2!
- 1...Sxh2
- 1.Rxf3?
- 1...Sxf3
- 2.Qxf3#
- 2.Qg2#
- 1...Bg1
- 2.Qxg1#
- 1...Bf4
- 2.Qg1#
- 1...Be5
- 2.Qg1#
- 1...Bd6
- 2.Qg1#
- 1...Bc7
- 2.Qg1#
- 1...Bb8
- 2.Qg1#
- 1...Sg2
- 2.Qxg2#
- 1...Sc2
- 2.Qg2#
- 1...Sd3
- 2.Qg2#
- 1...Bg3!
- 1...Sxf3
- 1.Rh5?
- 1...Sg2
- 2.Qxg2#
- 1...Sc2
- 2.Qxf3#
- 2.Qg2#
- 1...Sd3
- 2.Qxf3#
- 2.Qg2#
- 1...Sg1
- 2.Qxg1#
- 1...Sd2
- 2.Qg1#
- 1...Sd4
- 2.Qg1#
- 1...Se5
- 2.Qg1#
- 1...Sh4!
- 1...Sg2
- 1.Rh6?
- 1...Sg2
- 2.Qxg2#
- 1...Sc2
- 2.Qxf3#
- 2.Qg2#
- 1...Sd3
- 2.Qxf3#
- 2.Qg2#
- 1...Sg1
- 2.Qxg1#
- 1...Sd2
- 2.Qg1#
- 1...Sd4
- 2.Qg1#
- 1...Se5
- 2.Qg1#
- 1...Sh4!
- 1...Sg2
- 1.Rh7?
- 1...Sg2
- 2.Qxg2#
- 1...Sc2
- 2.Qxf3#
- 2.Qg2#
- 1...Sd3
- 2.Qxf3#
- 2.Qg2#
- 1...Sg1
- 2.Qxg1#
- 1...Sd2
- 2.Qg1#
- 1...Sd4
- 2.Qg1#
- 1...Se5
- 2.Qg1#
- 1...Sh4!
- 1...Sg2
- 1.Rh8?
- 1...Sc2
- 2.Qxf3#
- 2.Qg2#
- 1...Sg2
- 2.Qxg2#
- 1...Sd3
- 2.Qxf3#
- 2.Qg2#
- 1...Sg1
- 2.Qxg1#
- 1...Sd2
- 2.Qg1#
- 1...Sd4
- 2.Qg1#
- 1...Se5
- 2.Qg1#
- 1...Sh4!
- 1...Sc2
- 1.Qxf3+?
- 1...Sg2
- 2.Qxg2#
- 1...Sxf3!
- 1...Sg2
- 1.Qg3?
- 1...Sh4
- 2.Rxh2#
- 2.Qxh2#
- 2.Qg1#
- 1...Sc2
- 2.Qg2#
- 2.Qxf3#
- 1...Sg2
- 2.Qxg2#
- 1...Sd3
- 2.Qg2#
- 2.Qxf3#
- 1...Sg1
- 2.Rxh2#
- 2.Qxh2#
- 2.Qxg1#
- 1...Sd2
- 2.Rxh2#
- 2.Qxh2#
- 2.Qg1#
- 1...Sd4
- 2.Rxh2#
- 2.Qxh2#
- 2.Qg1#
- 1...Se5
- 2.Rxh2#
- 2.Qxh2#
- 2.Qg1#
- 1...g4!
- 1...Sh4
- 1.Qxg5?
- 1...Sh4
- 2.Qg1#
- 1...Sc2
- 2.Qg2#
- 1...Sg2
- 2.Qxg2#
- 1...Sd3
- 2.Qg2#
- 1...Sg1
- 2.Qxg1#
- 1...Sd2
- 2.Qg1#
- 1...Sd4
- 2.Qg1#
- 1...Se5
- 2.Qg1#
- 1...Sxg5!
- 1...Sh4
- 1.Ke4?
- Keys
- 1.Sf5!
- 1...Sg2
- 2.Sg3#
- 1...Sc2
- 2.Qxf3#
- 1...Sd3
- 2.Qxf3#
- 1...Sg1
- 2.Qxg1#
- 1...Sd2
- 2.Qg1#
- 1...Sd4
- 2.Qg1#
- 1...Sh4
- 2.Qg1#
- 1...Se5
- 2.Qg1#
- 1...Sg2
- 1.Sf5!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- S(a);N_GUARD::QAB1(D),XS(a)
- S(e);N_GUARD::QAR1(D),XS(e)
- S(e);N_GUARD::QAR1(D)
- Tries
- Try
- K(E);S_FLIGHT
- Vars
- S(a);N_GUARD::QAB1(D),XS(a)
- S(e);N_GUARD::QAR1(D),XS(e)
- S(e);N_GUARD::QAR1(D)
- Refutation
- S(e);CHECK
- Try
- K(E);P-FLIGHT
- Vars
- S(a);N_GUARD::QAB1(D),XS(a)
- S(e);N_GUARD::QAR1(D),XS(e)
- S(e);N_GUARD::QAR1(D)
- Refutation
- S(a);CHECK
- Try
- K(E);S_FLIGHT
- Vars
- S(a);N_GUARD::QAB1(D),XS(a)
- S(e);N_GUARD::QAR1(D),XS(e)
- S(e);N_GUARD::QAR1(D)
- Refutation
- S(e);CHECK
- Try
- S(B);
- Vars
- S(a);N_GUARD,XS(B)::QAB(D),XS(e)
- S(a);N_GUARD::QAB(D),XS(e)
- S(e);N_GUARD::QAR1(D),XS(e)
- S(e);N_GUARD::QAR1(D)
- Refutation
- S(a);
- Try
- S(B);
- Vars
- S(a);N_GUARD::QAB(D),XS(e)
- S(e);N_GUARD::QAR1(D),XS(e)
- S(e);N_GUARD::QAR1(D)
- Refutation
- S(a);
- Try
- B(A);
- Vars
- S(a);N_GUARD::QAB1(D),XS(a)
- S(a);N_GUARD::QAB1(D)
- S(e);N_GUARD::R1(C),XB(d)
- Refutation
- S(e);XB(A)
- Try
- R(C);CHECK,XB(d)
- Vars
- S(e);XR(C)::QAR1(D)
- Refutation
- K(b);P-FLIGHT,XR(C)
- Try
- R(C);N_PINB(d),XS(e)
- Vars
- B(d);N_GUARD::QAR1(D),XB(d)
- B(d);N_GUARD::QAR1(D)
- S(a);N_GUARD::QAB1(D),XS(a)
- S(a);N_GUARD::QAB1(D)
- Refutation
- B(d);
- Try
- R(C);
- Vars
- S(a);N_GUARD::QAB1(D),XS(a)
- S(e);N_GUARD::QAR1(D),XS(e)
- S(e);N_GUARD::QAR1(D)
- Refutation
- S(e);N_SPINB(d)
- Try
- R(C);
- Vars
- S(a);N_GUARD::QAB1(D),XS(a)
- S(e);N_GUARD::QAR1(D),XS(e)
- S(e);N_GUARD::QAR1(D)
- Refutation
- S(e);N_SPINB(d)
- Try
- R(C);
- Vars
- S(a);N_GUARD::QAB1(D),XS(a)
- S(e);N_GUARD::QAR1(D),XS(e)
- S(e);N_GUARD::QAR1(D)
- Refutation
- S(e);N_SPINB(d)
- Try
- R(C);
- Vars
- S(a);N_GUARD::QAB1(D),XS(a)
- S(e);N_GUARD::QAR1(D),XS(e)
- S(e);N_GUARD::QAR1(D)
- Refutation
- S(e);N_SPINB(d)
- Try
- Q(D);CHECK,XS(e)
- Vars
- S(a);N_GUARD,P_SPINS(a)::QAB1(D),XS(a)
- Refutation
- S(a);XQ(D)
- Try
- Q(D);
- Vars
- S(a);N_GUARD::QAB1(D),XS(a)
- Refutation
- P(f);
- Try
- Q(D);XP(f)
- Vars
- S(e);N_GUARD::QAR1(D)
- S(a);N_GUARD::QAB1(D)
- S(a);N_GUARD::QAB1(D),XS(a)
- S(e);N_GUARD::QAR1(D),XS(e)
- Refutation
- S(e);XQ(D)
- Try
- Actual
- S(B);
- Vars
- S(a);SBLOCK::S(B)
- S(a);N_GUARD::QAB(D),XS(e)
- S(e);N_GUARD::QAR1(D),XS(e)
- S(e);N_GUARD::QAR1(D)
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