MESON Chess Problem Database
Problem Display
PID: 196557 (2Qr4/4b3/pK1p1p2/R7/1k2B3/2p4R/n6p/Nr2n3 w - - 0 1)
Grolman, Lev
Zadachi i Etyudi, 1995
#2
6 + 11
SOLUTION
- SOUND
- Sets
- 1...Sc1
- 2.Qxc3#
- 1...Sc1
- Tries
- 1.Bc2?
- threat
- 2.Rh4#
- 2.Ra4#
- 2.Qg4#
- 1...Rxc8
- 2.Ra4#
- 1...h1Q
- 2.Ra4#
- 1...h1B
- 2.Ra4#
- 1...h1R
- 2.Ra4#
- 2.Qg4#
- 1...Rd1
- 2.Ra4#
- 1...Rb3
- 2.Rh4#
- 2.Qg4#
- 1...Rd7
- 2.Rh4#
- 2.Ra4#
- 1...Rg8
- 2.Ra4#
- 1...Rh8
- 2.Ra4#
- 2.Qg4#
- 1...Sg2
- 2.Ra4#
- 1...Sd3
- 2.Ra4#
- 1...Sf3
- 2.Ra4#
- 1...d5
- 2.Ra4#
- 1...f5
- 2.Ra4#
- 1...Sxc2!
- threat
- 1.Bd5?
- threat
- 2.Rh4#
- 2.Qg4#
- 2.Qc4#
- 1...h1Q
- 2.Qc4#
- 1...h1B
- 2.Qc4#
- 1...h1R
- 2.Qg4#
- 2.Qc4#
- 1...Rd1
- 2.Qc4#
- 1...Rd7
- 2.Rh4#
- 2.Qc4#
- 1...Rg8
- 2.Qc4#
- 1...Rh8
- 2.Qg4#
- 2.Qc4#
- 1...Sc2
- 2.Sxc2#
- 2.Qc4#
- 1...Sg2
- 2.Sc2#
- 2.Qc4#
- 1...Sd3
- 2.Sc2#
- 2.Qc4#
- 1...Sf3
- 2.Sc2#
- 2.Qc4#
- 1...f5
- 2.Qc4#
- 1...Rxc8!
- threat
- 1.Rh4?
- threat
- 2.Bxb1#
- 2.Bh1#
- 2.Bc2#
- 2.Bg2#
- 2.Bd3#
- 2.Bf3#
- 2.Bd5#
- 2.Bf5#
- 2.Bc6#
- 2.Bg6#
- 2.Bb7#
- 2.Bh7#
- 2.Ba8#
- 1...Rxa1
- 2.Bc2#
- 2.Bd5#
- 1...Rxc8
- 2.Bc6#
- 1...h1Q
- 2.Bxh1#
- 1...h1S
- 2.Bxb1#
- 2.Bxh1#
- 2.Bc2#
- 2.Bg2#
- 2.Bd3#
- 2.Bf3#
- 2.Bd5#
- 2.Bf5#
- 2.Bc6#
- 2.Bg6#
- 2.Bb7#
- 2.Bh7#
- 2.Ba8#
- 1...h1B
- 2.Bxh1#
- 2.Bg2#
- 2.Bf3#
- 1...h1R
- 2.Bxh1#
- 1...Rc1
- 2.Bb1#
- 2.Bh1#
- 2.Bc2#
- 2.Bg2#
- 2.Bd3#
- 2.Bf3#
- 2.Bd5#
- 2.Bf5#
- 2.Bc6#
- 2.Bg6#
- 2.Bb7#
- 2.Bh7#
- 2.Ba8#
- 1...Rd1
- 2.Bd3#
- 1...Rb2
- 2.Bb1#
- 2.Bh1#
- 2.Bc2#
- 2.Bg2#
- 2.Bd3#
- 2.Bf3#
- 2.Bd5#
- 2.Bf5#
- 2.Bc6#
- 2.Bg6#
- 2.Bb7#
- 2.Bh7#
- 2.Ba8#
- 1...Rb3
- 2.Bb1#
- 2.Bh1#
- 2.Bc2#
- 2.Bg2#
- 2.Bd3#
- 2.Bf3#
- 2.Bd5#
- 2.Bf5#
- 2.Bc6#
- 2.Bg6#
- 2.Bb7#
- 2.Bh7#
- 2.Ba8#
- 1...Rg8
- 2.Bg6#
- 1...Rh8
- 2.Bh7#
- 1...Sc2
- 2.Bxc2#
- 1...Sg2
- 2.Bxg2#
- 1...Sd3
- 2.Bxd3#
- 1...Sf3
- 2.Bxf3#
- 1...c2
- 2.Bh1#
- 2.Bxc2#
- 2.Bg2#
- 2.Bd3#
- 2.Bf3#
- 2.Bd5#
- 2.Bf5#
- 2.Bg6#
- 2.Bb7#
- 2.Bh7#
- 2.Ba8#
- 1...d5
- 2.Bxd5#
- 1...f5!
- threat
- 1.Rb5+?
- 1...Ka3
- 2.Qxa6#
- 1...Ka4
- 2.Qxa6#
- 1...axb5!
- 1...Ka3
- 1.Qxa6?
- threat
- 2.Ra4#
- 2.Qb5#
- 1...Rxa1
- 2.Qb5#
- 1...Rb8+!
- threat
- 1.Qc6?
- threat
- 2.Ra4#
- 2.Qa4#
- 1...Rxa1
- 2.Qa4#
- 1...Rb8+!
- threat
- 1.Bc2?
- Keys
- 1.Qg4!
- threat
- 2.Bxb1#
- 2.Bh1#
- 2.Bc2#
- 2.Bg2#
- 2.Bd3#
- 2.Bf3#
- 2.Bd5#
- 2.Bf5#
- 2.Bc6#
- 2.Bg6#
- 2.Bb7#
- 2.Bh7#
- 2.Ba8#
- 1...Kc4+
- 2.Bxb1#
- 1...Rb8+
- 2.Bb7#
- 1...Rxa1
- 2.Bc2#
- 2.Bd5#
- 1...h1Q
- 2.Bxh1#
- 2.Bg2#
- 2.Bf3#
- 1...h1S
- 2.Bxb1#
- 2.Bxh1#
- 2.Bc2#
- 2.Bg2#
- 2.Bd3#
- 2.Bf3#
- 2.Bd5#
- 2.Bf5#
- 2.Bc6#
- 2.Bg6#
- 2.Bb7#
- 2.Bh7#
- 2.Ba8#
- 1...h1B
- 2.Bxh1#
- 2.Bg2#
- 2.Bf3#
- 1...h1R
- 2.Bxb1#
- 2.Bxh1#
- 2.Bc2#
- 2.Bg2#
- 2.Bd3#
- 2.Bf3#
- 2.Bd5#
- 2.Bf5#
- 2.Bc6#
- 2.Bg6#
- 2.Bb7#
- 2.Bh7#
- 2.Ba8#
- 1...Rc1
- 2.Bb1#
- 2.Bh1#
- 2.Bc2#
- 2.Bg2#
- 2.Bd3#
- 2.Bf3#
- 2.Bd5#
- 2.Bf5#
- 2.Bc6#
- 2.Bg6#
- 2.Bb7#
- 2.Bh7#
- 2.Ba8#
- 1...Rd1
- 2.Bd3#
- 1...Rb2
- 2.Bb1#
- 2.Bh1#
- 2.Bc2#
- 2.Bg2#
- 2.Bd3#
- 2.Bf3#
- 2.Bd5#
- 2.Bf5#
- 2.Bc6#
- 2.Bg6#
- 2.Bb7#
- 2.Bh7#
- 2.Ba8#
- 1...Rb3
- 2.Bb1#
- 2.Bh1#
- 2.Bc2#
- 2.Bg2#
- 2.Bd3#
- 2.Bf3#
- 2.Bd5#
- 2.Bf5#
- 2.Bc6#
- 2.Bg6#
- 2.Bb7#
- 2.Bh7#
- 2.Ba8#
- 1...Ra8
- 2.Bxb1#
- 2.Bh1#
- 2.Bc2#
- 2.Bg2#
- 2.Bd3#
- 2.Bf3#
- 2.Bd5#
- 2.Bf5#
- 2.Bc6#
- 2.Bg6#
- 2.Bb7#
- 2.Bh7#
- 2.Bxa8#
- 1...Rc8
- 2.Bc6#
- 1...Rg8
- 2.Bg6#
- 1...Sc2
- 2.Bxc2#
- 1...Sg2
- 2.Bxg2#
- 1...Sd3
- 2.Bxd3#
- 1...Sf3
- 2.Bxf3#
- 1...c2
- 2.Bh1#
- 2.Bxc2#
- 2.Bg2#
- 2.Bd5#
- 2.Bf5#
- 2.Bc6#
- 2.Bg6#
- 2.Bb7#
- 2.Bh7#
- 2.Ba8#
- 1...d5
- 2.Bxd5#
- 1...f5
- 2.Bxf5#
- threat
- 1.Qg4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 11
- REMOVED MATES = 1
- Sets
- S(c);N_GUARD::QAB1(F),XP(e)
- Tries
- Try
- B(C);
- Threat
- DUALS(3)
- Vars
- R(k);XQ(F)::R1(D)
- P(d);::R1(D)
- R(a);::R1(D)
- R(k);::R1(D)
- S(b);::R1(D)
- P(h);::R1(D)
- P(i);::R1(D)
- Refutation
- S(b);XB(C)
- Try
- B(C);
- Threat
- DUALS(3)
- Vars
- P(d);::QAR1(F)
- R(a);::QAR1(F)
- R(k);::QAR1(F)
- P(i);::QAR1(F)
- Refutation
- R(k);XQ(F)
- Try
- R(B);
- Threat
- DUALS(13)
- Vars
- R(k);XQ(F)::R(B)+B(C)
- P(d);::R(B)+B(C),XQ(d)
- P(d);::R(B)+B(C),XR(d)
- R(a);::R(B)+B(C)
- R(k);::R(B)+B(C)
- S(b);::R(B)+B(C),XS(b)
- P(h);::R(B)+B(C),XP(h)
- Refutation
- P(i);
- Try
- R(D);CHECK
- Vars
- K(f);P_PINR(D),P_SPINP(e),S_FLIGHT::QAR(F),XP(g)
- K(f);P-FLIGHT,P_PINR(D)::QAR2(F),XP(g)
- Refutation
- P(g);XR(D)
- Try
- Q(F);XP(g)
- Threat
- DUALS(2)
- Vars
- R(a);XS(A)::QAR1(F)
- Refutation
- R(k);CHECK
- Try
- Q(F);
- Threat
- DUALS(2)
- Vars
- R(a);XS(A)::QAR1(F)
- Refutation
- R(k);CHECK
- Try
- Actual
- Q(F);
- Threat
- DUALS(13)
- Vars
- K(f);CHECK,P-FLIGHT::QAR(F)+B(C),XR(a)
- R(k);CHECK::QAR(F)+B(C)
- R(a);::QAR(F)+B(C)
- R(k);::QAR(F)+B(C)
- S(b);::QAR(F)+B(C),XS(b)
- P(h);::QAR(F)+B(C),XP(h)
- P(i);::QAR(F)+B(C),XP(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).