MESON Chess Problem Database
Problem Display
PID: 166290 (1QN1k1K1/4p3/4n3/8/8/8/2R5/8 w - - 0 1)
Lincoln, Robert A
StrateGems, 2016
#2
4 + 3
SOLUTION
- SOUND
- Sets
- 1...Kd7
- 2.Sb6#
- 1...Kd8
- 2.Sb6#
- 1...Sd4
- 2.Sb6#
- 1...Sf4
- 2.Sb6#
- 1...Sc5
- 2.Sb6#
- 1...Sg5
- 2.Sb6#
- 1...Sc7
- 2.Sb6#
- 1...Sg7
- 2.Sb6#
- 1...Sf8
- 2.Sb6#
- 1...Kd7
- Tries
- 1.Rc1?
- 1...Kd7
- 2.Sb6#
- 1...Kd8
- 2.Sb6#
- 1...Sd4
- 2.Sb6#
- 1...Sf4
- 2.Sb6#
- 1...Sc5
- 2.Sb6#
- 1...Sg5
- 2.Sb6#
- 1...Sc7
- 2.Sb6#
- 1...Sg7
- 2.Sb6#
- 1...Sf8
- 2.Sb6#
- 1...Sd8!
- 1...Kd7
- 1.Rd2?
- threat
- 2.Qb5#
- 1...Sd4
- 2.Sb6#
- 1...Sc5
- 2.Sb6#
- 2.Sa7#
- 1...Sc7
- 2.Sb6#
- 2.Sa7#
- 1...Sf8
- 2.Sb6#
- 2.Sa7#
- 1...Sd8!
- threat
- 1.Re2?
- 1...Kd8
- 2.Sb6#
- 1...Sd8
- 2.Rxe7#
- 1...Sd4
- 2.Sb6#
- 1...Sf4
- 2.Sb6#
- 1...Sc5
- 2.Sb6#
- 1...Sg5
- 2.Sb6#
- 1...Sc7
- 2.Sb6#
- 1...Sg7
- 2.Sb6#
- 1...Sf8
- 2.Sb6#
- 1...Kd7!
- 1...Kd8
- 1.Rc3?
- 1...Kd7
- 2.Sb6#
- 1...Kd8
- 2.Sb6#
- 1...Sd4
- 2.Sb6#
- 1...Sf4
- 2.Sb6#
- 1...Sc5
- 2.Sb6#
- 1...Sg5
- 2.Sb6#
- 1...Sc7
- 2.Sb6#
- 1...Sg7
- 2.Sb6#
- 1...Sf8
- 2.Sb6#
- 1...Sd8!
- 1...Kd7
- 1.Rc4?
- 1...Kd7
- 2.Sb6#
- 1...Kd8
- 2.Sb6#
- 1...Sd4
- 2.Sb6#
- 1...Sf4
- 2.Sb6#
- 1...Sc5
- 2.Sb6#
- 1...Sg5
- 2.Sb6#
- 1...Sc7
- 2.Sb6#
- 1...Sg7
- 2.Sb6#
- 1...Sf8
- 2.Sb6#
- 1...Sd8!
- 1...Kd7
- 1.Rc5?
- 1...Kd7
- 2.Sb6#
- 1...Kd8
- 2.Sb6#
- 1...Sxc5
- 2.Sb6#
- 1...Sd4
- 2.Sb6#
- 1...Sf4
- 2.Sb6#
- 1...Sg5
- 2.Sb6#
- 1...Sc7
- 2.Sb6#
- 1...Sg7
- 2.Sb6#
- 1...Sf8
- 2.Sb6#
- 1...Sd8!
- 1...Kd7
- 1.Qa7?
- threat
- 2.Qxe7#
- 1...Kd8
- 2.Qxe7#
- 1...Sc7!
- threat
- 1.Qb4?
- threat
- 2.Qxe7#
- 1...Kd7
- 2.Qxe7#
- 1...Kd8
- 2.Qxe7#
- 1...Sc5!
- threat
- 1.Qb7?
- threat
- 2.Qxe7#
- 1...Kd8
- 2.Qxe7#
- 1...Sc7!
- threat
- 1.Rc1?
- Keys
- 1.Rc7!
- threat
- 2.Sd6#
- 1...Kd8
- 2.Sb6#
- 2.Sd6#
- 2.Sa7#
- 2.Sxe7#
- 1...Sxc7
- 2.Sb6#
- 1...Sd8
- 2.Rxe7#
- threat
- 1.Rc7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 8
- Sets
- K(c);S_FLIGHT::S(C)
- K(c);P-FLIGHT::QAR(B)+S(C)
- S(a);N_GUARD::QAR(B)+S(C)
- Tries
- Try
- R(A);
- Vars
- K(c);S_FLIGHT::S(C)
- K(c);P-FLIGHT::QAR(B)+S(C)
- S(a);N_GUARD::QAR(B)+S(C)
- Refutation
- S(a);
- Try
- R(A);
- Threat
- QAB(B)
- Vars
- S(a);N_GUARD::QAR(B)+S(C)
- Refutation
- S(a);
- Try
- R(A);
- Vars
- K(c);P-FLIGHT::QAR(B)+S(C)
- S(a);OGATE,P_SPINP(b),SBLOCK::R1(A),XP(b)
- S(a);N_GUARD,P_SPINP(b)::QAR(B)+S(C)
- Refutation
- K(c);S_FLIGHT
- Try
- R(A);
- Vars
- K(c);S_FLIGHT::S(C)
- K(c);P-FLIGHT::QAR(B)+S(C)
- S(a);N_GUARD::QAR(B)+S(C)
- Refutation
- S(a);
- Try
- R(A);
- Vars
- K(c);S_FLIGHT::S(C)
- K(c);P-FLIGHT::QAR(B)+S(C)
- S(a);N_GUARD::QAR(B)+S(C)
- Refutation
- S(a);
- Try
- R(A);
- Vars
- K(c);S_FLIGHT::S(C)
- K(c);P-FLIGHT::QAR(B)+S(C)
- S(a);N_GUARD,XR(A)::QAR(B)+S(C)
- S(a);N_GUARD::QAR(B)+S(C)
- Refutation
- S(a);
- Try
- Q(B);
- Threat
- QAR1(B),XP(b)
- Vars
- K(c);P-FLIGHT::QAB1(B),XP(b)
- Refutation
- S(a);
- Try
- Q(B);
- Threat
- QAR1(B),XP(b)
- Vars
- K(c);S_FLIGHT::QAR1(B),XP(b)
- K(c);P-FLIGHT::QAB1(B),XP(b)
- Refutation
- S(a);
- Try
- Q(B);
- Threat
- QAR1(B),XP(b)
- Vars
- K(c);P-FLIGHT::QAB1(B),XP(b)
- Refutation
- S(a);
- Try
- Actual
- R(A);
- Threat
- QAR(B)+S(C),DCHECK
- Vars
- S(a);N_GUARD,XR(A)::QAR(B)+S(C)
- S(a);SBLOCK::R1(A),XP(b)
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).