MESON Chess Problem Database
Problem Display
PID: 47384 (b4r1q/B7/4N1Np/R7/1Q1nk1p1/1p3R2/1KP1n3/7B w - - 0 1)
Markovtsy, Vassyl Yuriovich
Problem Observer, 2003
#2
9 + 9
SOLUTION
- SOUND
- Sets
- 1...Qe5
- 2.Rxe5#
- 1...Qh7
- 2.Re5#
- 1...Qg8
- 2.Re5#
- 1...Rf6
- 2.Re5#
- 1...Rb8
- 2.Rxb3#
- 2.Rc3#
- 2.Rd3#
- 2.Rg3#
- 2.Rh3#
- 1...Rc8
- 2.Rxb3#
- 2.Rc3#
- 2.Rd3#
- 2.Rg3#
- 2.Rh3#
- 1...Rd8
- 2.Rxb3#
- 2.Rc3#
- 2.Rd3#
- 2.Rg3#
- 2.Rh3#
- 1...Re8
- 2.Rxb3#
- 2.Rc3#
- 2.Rd3#
- 2.Rg3#
- 2.Rh3#
- 1...Rg8
- 2.Rxb3#
- 2.Rc3#
- 2.Rd3#
- 2.Rg3#
- 2.Rh3#
- 1...Bd5
- 2.Sc5#
- 1...h5
- 2.Sg5#
- 1...Qe5
- Tries
- 1.Rf2+?
- 1...Rf3
- 2.Rxe2#
- 1...Ke3!
- 1...Rf3
- 1.Qd2?
- threat
- 2.Re3#
- 2.Rf4#
- 2.Qe3#
- 2.Qd3#
- 1...Sxc2+
- 2.Rf6#
- 1...Sb5+
- 2.Rf6#
- 1...Sf5+
- 2.Rc3#
- 1...Sc6+
- 2.Rf6#
- 1...Sxe6+
- 2.Rf6#
- 1...Rxf3
- 2.Qd3#
- 1...gxf3
- 2.Qd3#
- 1...Qe5
- 2.Rf4#
- 2.Rxe5#
- 2.Qe3#
- 2.Qd3#
- 1...Rf4
- 2.Re3#
- 2.Rxf4#
- 2.Qe3#
- 2.Qd3#
- 1...Bd5
- 2.Sc5#
- 2.Rf4#
- 2.Qe3#
- 2.Qd3#
- 1...Sc1
- 2.Re3#
- 2.Rf4#
- 2.Qe3#
- 1...Sf4
- 2.Re3#
- 2.Rxf4#
- 2.Qe3#
- 1...Sxf3+!
- threat
- 1.Qxb3?
- threat
- 2.Sc5#
- 2.Re3#
- 2.Rf4#
- 2.Qd3#
- 2.Qe3#
- 1...Sxc2+
- 2.Rf6#
- 1...Sxb3+
- 2.Rf6#
- 1...Sb5+
- 2.Rf6#
- 1...Sf5+
- 2.Rc3#
- 1...Sc6+
- 2.Rf6#
- 1...Sxe6+
- 2.Rf6#
- 1...Rxf3
- 2.Qd3#
- 1...gxf3
- 2.Qd3#
- 1...Qe5
- 2.Rf4#
- 2.Rxe5#
- 2.Qd3#
- 2.Qe3#
- 1...Rf4
- 2.Re3#
- 2.Rxf4#
- 2.Qd3#
- 2.Qe3#
- 1...Rf5
- 2.Re3#
- 2.Rf4#
- 2.Qd3#
- 2.Qe3#
- 1...Rb8
- 2.Sc5#
- 2.Re3#
- 2.Rf4#
- 1...Rc8
- 2.Re3#
- 2.Rf4#
- 2.Qd3#
- 2.Qe3#
- 1...Bd5
- 2.Sc5#
- 2.Rf4#
- 2.Qxd5#
- 2.Qd3#
- 2.Qe3#
- 1...Sc1
- 2.Sc5#
- 2.Re3#
- 2.Rf4#
- 2.Qe3#
- 1...Sc3
- 2.Sc5#
- 1...Sf4
- 2.Re3#
- 2.Rxf4#
- 2.Qe3#
- 1...Sxf3+!
- threat
- 1.Qc4?
- threat
- 2.Sc5#
- 2.Qd3#
- 1...Rxf3
- 2.Qd3#
- 1...gxf3
- 2.Qd3#
- 1...Qe5
- 2.Rxe5#
- 2.Qd3#
- 1...Rf4
- 2.Qd3#
- 1...Rf5
- 2.Qd3#
- 1...Rc8
- 2.Rxb3#
- 2.Rc3#
- 2.Rd3#
- 2.Rg3#
- 2.Rh3#
- 2.Qd3#
- 1...Sc1
- 2.Sc5#
- 1...Sf4!
- threat
- 1.Qb7+?
- 1...Sc6+
- 2.Rf6#
- 1...Bxb7!
- 1...Sc6+
- 1.Rf2+?
- Keys
- 1.Qe7!
- threat
- 2.Sg5#
- 1...Sxc2+
- 2.Sg7#
- 1...Sxf3+
- 2.Sg7#
- 1...Sb5+
- 2.Rf6#
- 1...Sf5+
- 2.Rc3#
- 1...Sc6+
- 2.Rf6#
- 1...Sxe6+
- 2.Rf6#
- 1...Qe5
- 2.Rxe5#
- threat
- 1.Qe7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 6
- REMOVED MATES = 5
- Sets
- Q(i);N_GUARD::R1(F),XQ(i)
- Q(i);N_GUARD::R1(F)
- R(h);S_CUTQ(i)::R1(F)
- B(g);SBLOCK::S(G)
- P(f);N_GUARD::S(G)
- Tries
- Try
- R(D);CHECK
- Vars
- R(h);P_SPINR(h)::R(D),XS(a)
- Refutation
- K(d);P-FLIGHT
- Try
- Q(E);N_PINS(c)
- Threat
- DUALS(4)
- Vars
- S(c);CHECK,N_GUARD,XP(C)::B(A)+R(D)
- S(c);CHECK,N_GUARD::B(A)+R(D)
- S(c);CHECK,N_GUARD,S_CUTR(h)::B(A)+R(D)
- S(c);CHECK,N_GUARD,XS(G)::B(A)+R(D)
- R(h);P_SPINR(h),XR(D)::QAB1(E)
- P(e);P_SPINP(e),XR(D)::QAB1(E)
- Refutation
- S(c);CHECK,P_SPINS(c),XR(D)
- Try
- Q(E);N_PINS(c),XP(b)
- Threat
- DUALS(5)
- Vars
- S(c);CHECK,N_GUARD,XP(C)::B(A)+R(D)
- S(c);CHECK,N_GUARD,XQ(E)::B(A)+R(D)
- S(c);CHECK,N_GUARD::B(A)+R(D)
- S(c);CHECK,N_GUARD,S_CUTR(h)::B(A)+R(D)
- S(c);CHECK,N_GUARD,XS(G)::B(A)+R(D)
- R(h);P_SPINR(h),XR(D)::QAB1(E)
- P(e);P_SPINP(e),XR(D)::QAB1(E)
- S(a);::S(G)
- Refutation
- S(c);CHECK,P_SPINS(c),XR(D)
- Try
- Q(E);
- Threat
- DUALS(2)
- Vars
- R(h);P_SPINR(h),XR(D)::QAB1(E)
- P(e);P_SPINP(e),XR(D)::QAB1(E)
- R(h);::QAB1(E)
- S(a);::S(G)
- Refutation
- S(a);
- Try
- Q(E);CHECK,N_PINS(c)
- Vars
- S(c);CHECK,P_SPINS(c)::B(A)+R(D)
- Refutation
- B(g);XQ(E)
- Try
- Actual
- Q(E);N_PINS(c)
- Threat
- QAR(E)+S(G),DCHECK
- Vars
- S(c);CHECK,N_GUARD,XP(C)::QAR(E)+S(G)
- S(c);CHECK,N_GUARD,P_SPINS(c),XR(D)::QAR(E)+S(G)
- S(c);CHECK,N_GUARD::B(A)+R(D)
- S(c);CHECK,N_GUARD,S_CUTR(h)::B(A)+R(D)
- S(c);CHECK,N_GUARD,P_SPINS(c),XS(G)::B(A)+R(D)
- Q(i);N_GUARD::R1(F),XQ(i)
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).