MESON Chess Problem Database
Problem Display
PID: 228693 (1b6/3R2KB/4N2n/1pNPkp2/1QP3Pp/2p3q1/2p1n2B/2rb1R2 w - - 0 1)
Murashev, Pavel Aleksandrovich
1st Prize, StrateGems, 2020
#2
11 + 12
SOLUTION
- SOUND
- Sets
- 1...Sg1
- 2.Qxc3#
- 1...Sxg4
- 2.Rxf5#
- 1...Sf7
- 2.Rxf5#
- 1...Sg8
- 2.Rxf5#
- 1...bxc4
- 2.Qxb8#
- 1...fxg4
- 2.Sd3#
- 1...Sg1
- Tries
- 1.Bxg3+?
- 1...Sxg3
- 2.Qxc3#
- 1...Sf4
- 2.Bxf4#
- 2.Qxc3#
- 1...f4
- 2.Sd3#
- 1...hxg3!
- 1...Sxg3
- 1.Bxf5?
- threat
- 2.Sd3#
- 1...Sxf5+
- 2.Rxf5#
- 1...bxc4
- 2.Qxb8#
- 1...Sf4!
- threat
- 1.Qxc3+?
- 1...Sd4
- 2.Qxd4#
- 2.Qe3#
- 1...Sxc3!
- 1...Sd4
- 1.cxb5?
- threat
- 2.Sd3#
- 1...Sd4
- 2.Qxd4#
- 1...Sf4
- 2.Qd4#
- 1...f4
- 2.Qe4#
- 1...Bd6!
- threat
- 1.Bxg3+?
- Keys
- 1.Rf3!
- threat
- 2.Re3#
- 1...Sxg4
- 2.Rxf5#
- 1...Sf4
- 2.Qxc3#
- 1...f4
- 2.Sd3#
- threat
- 1.Rf3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 5
- Sets
- S(d);N_GUARD::QAB(C),XP(e)
- S(k);N_GUARD,XP(E)::R1(A),XP(j)
- S(k);N_GUARD::R1(A),XP(j)
- P(h);OGATE,XP(D)::QAB(C),XB(l)
- P(j);XP(E)::S(F)
- Tries
- Try
- B(B);CHECK,N_SPINP(E),XQ(f)
- Vars
- S(d);XB(B)::QAB(C),XP(e)
- P(j);P_SPINP(j)::S(F)
- Refutation
- P(g);XB(B)
- Try
- B(K);XP(j)
- Threat
- S(F)
- Vars
- S(k);CHECK,OGATE,XB(K)::R1(A),XS(k)
- P(h);OGATE,XP(D)::QAB(C),XB(l)
- Refutation
- S(d);N_SPINQ(f)
- Try
- Q(C);CHECK,XP(e)
- Refutation
- S(d);XQ(C)
- Try
- P(D);XP(h)
- Threat
- S(F)
- Vars
- S(d);N_GUARD::QAB1(C),XS(d)
- S(d);N_GUARD,N_SPINQ(f)::QAB1(C)
- P(j);N_GUARD,N_SPINQ(f)::QAR1(C)
- Refutation
- B(l);
- Try
- Actual
- R(A);
- Threat
- R(A)
- Vars
- S(k);N_GUARD,XP(E)::R1(A),XP(j)
- S(d);N_GUARD,N_SPINQ(f)::QAB(C),XP(e)
- P(j);N_SPINQ(f)::S(F)
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).