MESON Chess Problem Database
Problem Display
PID: 143710 (4NN1K/1n1P4/r5p1/2b1k3/4P2Q/2R1P2B/1R5q/B5r1 w - - 0 1)
Simadhinata, Januarta (Siem Giok Liam)
US Problem Bulletin, 1964
#2
11 + 7
SOLUTION
- SOUND
- Sets
- 1...Qf4
- 2.Qxf4#
- 1...Qh1
- 2.Qf4#
- 1...Qxb2
- 2.Qf4#
- 1...Qc2
- 2.Qf4#
- 1...Qd2
- 2.Qf4#
- 1...Qe2
- 2.Qf4#
- 1...Qg2
- 2.Qf4#
- 1...Rg3
- 2.Qf4#
- 1...Bb6
- 2.Qe7#
- 1...Sa5
- 2.Rxc5#
- 1...Sd6
- 2.Rxc5#
- 2.Qe7#
- 1...Sd8
- 2.Rxc5#
- 1...Qf4
- Tries
- 1.Rd2?
- threat
- 2.Rd5#
- 2.Rxc5#
- 1...Qxd2
- 2.Rxc5#
- 2.Qf4#
- 1...Rgxa1
- 2.Rd5#
- 1...Raxa1
- 2.Rd5#
- 1...Bxe3
- 2.Rd5#
- 2.Rc5#
- 1...Bxf8
- 2.Rd5#
- 2.Rc5#
- 1...Qf4
- 2.Qxf4#
- 1...Rd1
- 2.Rxc5#
- 1...Rd6
- 2.Rxc5#
- 1...Ba3
- 2.Rd5#
- 2.Rc5#
- 1...Bb4
- 2.Rd5#
- 2.Rc5#
- 1...Bd4
- 2.exd4#
- 1...Bb6
- 2.Rd5#
- 2.Rc5#
- 2.Qe7#
- 1...Bd6
- 2.Rd5#
- 2.Rc5#
- 1...Ba7
- 2.Rd5#
- 2.Rc5#
- 1...Be7
- 2.Rd5#
- 2.Rc5#
- 1...Rg4!
- threat
- 1.Rg2?
- threat
- 2.Rxc5#
- 1...Rgxa1
- 2.Rg5#
- 1...Raxa1
- 2.Sxg6#
- 1...Bxe3
- 2.Rc5#
- 1...Bxf8
- 2.Rc5#
- 1...Qf4
- 2.Qxf4#
- 1...Ba3
- 2.Rc5#
- 1...Bb4
- 2.Rc5#
- 1...Bb6
- 2.Sxg6#
- 2.Rc5#
- 2.Qe7#
- 1...Bd6
- 2.Sxg6#
- 2.Rc5#
- 1...Ba7
- 2.Rc5#
- 1...Be7
- 2.Rc5#
- 1...Bd4!
- threat
- 1.Rxh2?
- threat
- 2.Rxc5#
- 2.Qf4#
- 1...Rgxa1
- 2.Qf4#
- 1...Raxa1
- 2.Qf4#
- 1...Bxe3
- 2.Rc5#
- 1...Bxf8
- 2.Rc5#
- 2.Qf4#
- 1...Rf1
- 2.Rxc5#
- 1...Rf6
- 2.Rxc5#
- 1...Ba3
- 2.Rc5#
- 2.Qf4#
- 1...Bb4
- 2.Rc5#
- 2.Qf4#
- 1...Bd4
- 2.Qf4#
- 1...Bb6
- 2.Rc5#
- 2.Qe7#
- 2.Qf4#
- 1...Bd6
- 2.Rc5#
- 2.Qf4#
- 1...Ba7
- 2.Rc5#
- 2.Qf4#
- 1...Be7
- 2.Rc5#
- 2.Qf4#
- 1...g5
- 2.Rxc5#
- 1...Rg4!
- threat
- 1.Rb6?
- threat
- 2.Rxc5#
- 1...Rgxa1
- 2.Sxg6#
- 1...Raxa1
- 2.Re6#
- 1...Bxe3
- 2.Rc5#
- 1...Bxb6
- 2.Rc5#
- 2.Qe7#
- 1...Bxf8
- 2.Rc5#
- 1...Qf4
- 2.Qxf4#
- 1...Qb2
- 2.Qf4#
- 1...Ba3
- 2.Rc5#
- 1...Bb4
- 2.Rc5#
- 1...Bd4
- 2.Qe7#
- 1...Bd6
- 2.Rc5#
- 1...Be7
- 2.Rc5#
- 2.Qxe7#
- 1...Rg4!
- threat
- 1.Rxb7?
- threat
- 2.Rxc5#
- 1...Bxe3
- 2.Rc5#
- 1...Bxf8
- 2.Rc5#
- 1...Qf4
- 2.Qxf4#
- 1...Ba3
- 2.Rc5#
- 1...Bb4
- 2.Rc5#
- 1...Bd4
- 2.Rc5#
- 1...Bb6
- 2.Rc5#
- 2.Qe7#
- 1...Bd6
- 2.Rc5#
- 1...Ba7
- 2.Rc5#
- 1...Be7
- 2.Rc5#
- 1...Rg4!
- threat
- 1.Qe7+?
- 1...Re6
- 2.Qxe6#
- 1...Bxe7!
- 1...Re6
- 1.d8Q?
- threat
- 2.Sd7#
- 2.Qd5#
- 1...Qxh3
- 2.Qd5#
- 1...Bxe3
- 2.Qd5#
- 1...Bxf8
- 2.Qd4#
- 2.Qd5#
- 1...Sxd8
- 2.Sd7#
- 2.Rxc5#
- 1...Qf4
- 2.Qxf4#
- 2.Qd5#
- 1...Rg4
- 2.Qd5#
- 1...Qd2
- 2.Qf4#
- 1...Rd1
- 2.Qdg5#
- 1...Bd6
- 2.Sd7#
- 2.Qdf6#
- 1...Sd6
- 2.Sd7#
- 2.Rxc5#
- 2.Qhe7#
- 2.Qdf6#
- 2.Qde7#
- 1...Rd6!
- threat
- 1.Rd2?
- Keys
- 1.Rb4!
- threat
- 2.Rxc5#
- 1...Rgxa1
- 2.Qg5#
- 1...Raxa1
- 2.Qf6#
- 1...Bxe3
- 2.Rc5#
- 1...Bxb4
- 2.Rc5#
- 1...Bxf8
- 2.Rc5#
- 1...Qb2
- 2.Qf4#
- 1...Bd4
- 2.exd4#
- 1...Bb6
- 2.Rc5#
- 2.Qf6#
- 2.Qe7#
- 1...Bd6
- 2.Rc5#
- 2.Qf6#
- 1...Ba7
- 2.Rc5#
- 1...Be7
- 2.Rc5#
- threat
- 1.Rb4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 8
- REMOVED MATES = 10
- Sets
- Q(b);N_GUARD::QAB1(G),XQ(b)
- Q(b);N_GUARD::QAB1(G)
- Q(b);N_GUARD,XR(B)::QAB1(G)
- R(a);S_CUTQ(b)::QAB1(G)
- B(c);N_GUARD,S_CUTR(e)::QAR2(G)
- S(g);N_GUARD::R(C),XB(c)
- Tries
- Try
- R(B);
- Threat
- DUALS(2)
- Vars
- R(a);XB(A)::R1(B)
- R(e);XB(A)::R1(B)
- Q(b);N_GUARD::QAB1(G),XQ(b)
- R(a);::B(A)+R(C),DCHECK,XB(c)
- R(e);::B(A)+R(C),DCHECK,XB(c)
- B(c);OGATE::P(D),XB(c)
- Refutation
- R(a);
- Try
- R(B);
- Threat
- B(A)+R(C),DCHECK,XB(c)
- Vars
- R(a);N_GUARD,XB(A)::R(B)
- R(e);N_GUARD,XB(A)::S(J),XP(f)
- B(c);XP(D)::B(A)+R(C),DCHECK
- B(c);XS(J)::B(A)+R(C),DCHECK
- Q(b);N_GUARD::QAB1(G),XQ(b)
- B(c);::B(A)+R(C),DCHECK
- Refutation
- B(c);
- Try
- R(B);XQ(b)
- Threat
- DUALS(2)
- Vars
- R(a);XB(A)::QAB1(G)
- R(e);XB(A)::QAB1(G)
- B(c);XP(D)::B(A)+R(C),DCHECK
- R(a);::B(A)+R(C),DCHECK,XB(c)
- R(e);::B(A)+R(C),DCHECK,XB(c)
- B(c);::QAB1(G)
- P(f);::B(A)+R(C),DCHECK,XB(c)
- Refutation
- R(a);
- Try
- R(B);
- Threat
- B(A)+R(C),DCHECK,XB(c)
- Vars
- R(a);N_GUARD,XB(A)::S(J),XP(f)
- R(e);N_GUARD,XB(A)::R1(B)
- B(c);XP(D)::B(A)+R(C),DCHECK
- B(c);XS(J)::B(A)+R(C),DCHECK
- Q(b);N_GUARD::QAB1(G),XQ(b)
- Q(b);N_GUARD::QAB1(G)
- B(c);::B(A)+R(C),DCHECK
- B(c);N_GUARD::QAR2(G)
- Refutation
- R(a);
- Try
- R(B);XS(g)
- Threat
- B(A)+R(C),DCHECK,XB(c)
- Vars
- B(c);XP(D)::B(A)+R(C),DCHECK
- B(c);XS(J)::B(A)+R(C),DCHECK
- Q(b);N_GUARD::QAB1(G),XQ(b)
- B(c);::B(A)+R(C),DCHECK
- B(c);::R(C)
- Refutation
- R(a);
- Try
- Q(G);CHECK,P_SPINB(E)
- Vars
- R(e);N_GUARD,P_SPINR(e)::QAR1(G),XR(e)
- Refutation
- B(c);XQ(G)
- Try
- P(H);
- Threat
- DUALS(2)
- Vars
- Q(b);P_PINQ(G),XB(E)::QAR1(H)
- B(c);XP(D)::QAR1(H)
- R(a);::QAR1(H)
- Q(b);N_GUARD::QAB1(G)
- R(a);N_GUARD::QAR2(H)
- Refutation
- R(e);
- Try
- Actual
- R(B);
- Threat
- B(A)+R(C),DCHECK,XB(c)
- Vars
- R(a);N_GUARD,XB(A)::QAR2(G)
- R(e);N_GUARD,XB(A)::QAB1(G)
- B(c);XP(D)::B(A)+R(C),DCHECK
- B(c);XR(B)::B(A)+R(C),DCHECK
- B(c);XS(J)::B(A)+R(C),DCHECK
- Q(b);N_GUARD::QAB1(G)
- B(c);OGATE::P(D),XB(c)
- B(c);::B(A)+R(C),DCHECK
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).