MESON Chess Problem Database
Problem Display
PID: 23272 (8/8/8/8/1p1N4/kp6/p2K4/5Q2 w - - 0 1)
McDowell, Michael
The Problemist, 1997
#2
3 + 4
SOLUTION
- SOUND
- Sets
- 1...Kb2
- 2.Qc1#
- 1...Ka4
- 2.Qa6#
- 1...a1Q
- 2.Qxa1#
- 1...a1S
- 2.Qxa1#
- 1...a1B
- 2.Qxa1#
- 1...a1R
- 2.Qxa1#
- 1...b2
- 2.Qa6#
- 1...Kb2
- Tries
- 1.Ke3?
- 1...Ka4
- 2.Qa6#
- 1...a1Q
- 2.Qxa1#
- 1...a1S
- 2.Qxa1#
- 1...a1B
- 2.Qxa1#
- 1...a1R
- 2.Qxa1#
- 1...b2
- 2.Qa6#
- 1...Kb2!
- 1...Ka4
- 1.Sc2+?
- 1...Kb2
- 2.Qa1#
- 2.Qc1#
- 1...Ka4
- 2.Qa6#
- 1...bxc2!
- 1...Kb2
- 1.Sf3?
- 1...Kb2
- 2.Qc1#
- 1...Ka4
- 2.Qa6#
- 1...a1Q
- 2.Qxa1#
- 1...a1S
- 2.Qxa1#
- 1...a1B
- 2.Qxa1#
- 1...a1R
- 2.Qxa1#
- 1...b2!
- 1...Kb2
- 1.Sb5+?
- 1...Kb2
- 2.Qc1#
- 1...Ka4!
- 1...Kb2
- 1.Sf5?
- 1...Kb2
- 2.Qc1#
- 1...Ka4
- 2.Qa6#
- 1...a1Q
- 2.Qxa1#
- 1...a1S
- 2.Qxa1#
- 1...a1B
- 2.Qxa1#
- 1...a1R
- 2.Qxa1#
- 1...b2!
- 1...Kb2
- 1.Sc6?
- 1...Kb2
- 2.Qc1#
- 1...Ka4
- 2.Qa6#
- 1...a1Q
- 2.Qxa1#
- 1...a1S
- 2.Qxa1#
- 1...a1B
- 2.Qxa1#
- 1...a1R
- 2.Qxa1#
- 1...b2!
- 1...Kb2
- 1.Se6?
- 1...Kb2
- 2.Qc1#
- 1...Ka4
- 2.Qa6#
- 1...a1Q
- 2.Qxa1#
- 1...a1S
- 2.Qxa1#
- 1...a1B
- 2.Qxa1#
- 1...a1R
- 2.Qxa1#
- 1...b2!
- 1...Kb2
- 1.Qc4?
- threat
- 2.Qxb3#
- 1...Kb2
- 2.Qc1#
- 1...Ka4
- 2.Qa6#
- 1...b2
- 2.Qb3#
- 2.Qa6#
- 1...a1S!
- threat
- 1.Qd1?
- threat
- 2.Qxb3#
- 1...Kb2
- 2.Qc1#
- 1...a1S
- 2.Qxa1#
- 1...b2
- 2.Sb5#
- 2.Qb3#
- 1...Ka4!
- threat
- 1.Ke3?
- Keys
- 1.Qh1!
- 1...Kb2
- 2.Qc1#
- 1...Ka4
- 2.Qa8#
- 1...a1Q
- 2.Qxa1#
- 1...a1S
- 2.Qxa1#
- 1...a1B
- 2.Qxa1#
- 1...a1R
- 2.Qxa1#
- 1...b2
- 2.Qa8#
- 1...Kb2
- 1.Qh1!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- K(b);S_FLIGHT::QAB1(A)
- K(b);P-FLIGHT::QAR2(A)
- P(a);OGATEB::QAR2(A),XQ(a)
- P(a);OGATEB::QAR2(A),XS(a)
- P(a);OGATEB::QAR2(A),XB(a)
- P(a);OGATEB::QAR2(A),XR(a)
- P(c);SBLOCK::QAR(A)
- Tries
- Try
- K(B);S_FLIGHT
- Vars
- K(b);P-FLIGHT::QAR2(A)
- P(a);OGATEB::QAR2(A),XQ(a)
- P(a);OGATEB::QAR2(A),XS(a)
- P(a);OGATEB::QAR2(A),XB(a)
- P(a);OGATEB::QAR2(A),XR(a)
- P(c);SBLOCK::QAR(A)
- Refutation
- K(b);S_FLIGHT
- Try
- S(C);CHECK
- Vars
- K(b);P-FLIGHT::QAR2(A)
- Refutation
- P(c);XS(C)
- Try
- S(C);
- Vars
- K(b);S_FLIGHT::QAB1(A)
- K(b);P-FLIGHT::QAR2(A)
- P(a);OGATEB::QAR2(A),XQ(a)
- P(a);OGATEB::QAR2(A),XS(a)
- P(a);OGATEB::QAR2(A),XB(a)
- P(a);OGATEB::QAR2(A),XR(a)
- Refutation
- P(c);
- Try
- S(C);CHECK
- Vars
- K(b);S_FLIGHT::QAB1(A)
- Refutation
- K(b);P-FLIGHT
- Try
- S(C);
- Vars
- K(b);S_FLIGHT::QAB1(A)
- K(b);P-FLIGHT::QAR2(A)
- P(a);OGATEB::QAR2(A),XQ(a)
- P(a);OGATEB::QAR2(A),XS(a)
- P(a);OGATEB::QAR2(A),XB(a)
- P(a);OGATEB::QAR2(A),XR(a)
- Refutation
- P(c);
- Try
- S(C);
- Vars
- K(b);S_FLIGHT::QAB1(A)
- K(b);P-FLIGHT::QAR2(A)
- P(a);OGATEB::QAR2(A),XQ(a)
- P(a);OGATEB::QAR2(A),XS(a)
- P(a);OGATEB::QAR2(A),XB(a)
- P(a);OGATEB::QAR2(A),XR(a)
- Refutation
- P(c);
- Try
- S(C);
- Vars
- K(b);S_FLIGHT::QAB1(A)
- K(b);P-FLIGHT::QAR2(A)
- P(a);OGATEB::QAR2(A),XQ(a)
- P(a);OGATEB::QAR2(A),XS(a)
- P(a);OGATEB::QAR2(A),XB(a)
- P(a);OGATEB::QAR2(A),XR(a)
- Refutation
- P(c);
- Try
- Q(A);
- Threat
- QAR1(A),XP(c)
- Vars
- K(b);S_FLIGHT::QAB1(A)
- K(b);P-FLIGHT,P_SPINP(d)::QAR2(A)
- Refutation
- P(a);
- Try
- Q(A);
- Threat
- QAR1(A),XP(c)
- Vars
- K(b);S_FLIGHT::QAB1(A)
- P(a);OGATEB::QAR2(A),XS(a)
- Refutation
- K(b);P-FLIGHT,P_SPINP(c)
- Try
- Actual
- Q(A);
- Vars
- K(b);S_FLIGHT::QAB1(A)
- K(b);P-FLIGHT::QAR(A)
- P(a);OGATEB::QAR2(A),XQ(a)
- P(a);OGATEB::QAR2(A),XS(a)
- P(a);OGATEB::QAR2(A),XB(a)
- P(a);OGATEB::QAR2(A),XR(a)
- P(c);SBLOCK::QAR(A)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).