MESON Chess Problem Database
Problem Display
PID: 276165 (8/4p3/2p2R1B/Q3pn2/2ppk2N/K4N1r/b4P1b/3R3B w - - 0 1)
Kofman, Rafael Moiseevich
Die Schwalbe, 1933
#2
9 + 10
SOLUTION
- SOUND
- Sets
- 1...Rxf3+
- 2.Bxf3#
- 1...Rg3
- 2.Qxe5#
- 1...Rxh4
- 2.Se1#
- 2.Sg1#
- 2.Sxh2#
- 2.Sxd4#
- 2.Sxh4#
- 2.Sxe5#
- 1...Bg1
- 2.Qxe5#
- 1...Bg3
- 2.Sh2#
- 1...Se3
- 2.Sg5#
- 1...Sg3
- 2.Sg5#
- 2.Qxe5#
- 1...c5
- 2.Qa8#
- 1...Rxf3+
- Tries
- 1.Be3?
- threat
- 2.Sg5#
- 1...Rxf3
- 2.Bxf3#
- 1...dxe3!
- threat
- 1.Re1+?
- 1...Kd3
- 2.Qd2#
- 1...Se3!
- 1...Kd3
- 1.Rxd4+?
- 1...exd4
- 2.Qxf5#
- 1...Sxd4!
- 1...exd4
- 1.Qe1+?
- 1...Se3
- 2.Sg5#
- 1...Kd5!
- 1...Se3
- 1.Qb6?
- threat
- 2.Qxc6#
- 1...Rxf3+
- 2.Bxf3#
- 1...Kd5
- 2.Qxc6#
- 1...Se3
- 2.Sg5#
- 1...c5
- 2.Qc6#
- 2.Qb7#
- 1...c3!
- threat
- 1.Qc7?
- threat
- 2.Qxc6#
- 1...Rxf3+
- 2.Bxf3#
- 1...Kd5
- 2.Qxc6#
- 1...Se3
- 2.Sg5#
- 1...c5
- 2.Qc6#
- 2.Qb7#
- 1...c3!
- threat
- 1.Qa4?
- threat
- 2.Qxc6#
- 1...Rxf3+
- 2.Bxf3#
- 1...Kd5
- 2.Qxc6#
- 1...Se3
- 2.Sg5#
- 1...c5
- 2.Qc6#
- 2.Qa8#
- 1...c3!
- threat
- 1.Qb5?
- threat
- 2.Qxc6#
- 1...Rxf3+
- 2.Bxf3#
- 1...c5
- 2.Qc6#
- 2.Qb7#
- 1...c3
- 2.Sd2#
- 1...Se3
- 2.Sg5#
- 1...cxb5!
- threat
- 1.Qc5?
- threat
- 2.Qxc6#
- 1...Rxf3+
- 2.Bxf3#
- 1...Se3
- 2.Sg5#
- 1...c3!
- threat
- 1.Qa8?
- threat
- 2.Qxc6#
- 1...Rxf3+
- 2.Bxf3#
- 1...Kd5
- 2.Qxc6#
- 1...Se3
- 2.Sg5#
- 1...c3!
- threat
- 1.Be3?
- Keys
- 1.Qa6!
- threat
- 2.Qxc6#
- 1...Rxf3+
- 2.Bxf3#
- 1...Kd5
- 2.Qxc6#
- 1...c3
- 2.Sd2#
- 1...Se3
- 2.Sg5#
- 1...c5
- 2.Qb7#
- 2.Qc6#
- 2.Qa8#
- threat
- 1.Qa6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 4
- Sets
- R(c);CHECK,OGATE,P_SPINR(c),XS(E)::B(B),XR(c)
- R(c);S_CUTB(b)::QAR1(G),XP(g)
- B(b);N_GUARD::QAR1(G),XP(g)
- B(b);N_PINS(E)::B(B)+S(E)
- S(h);N_PINS(E)::B(B)+S(E),DCHECK
- P(i);OGATEB::QAB(G)
- Tries
- Try
- B(I);N_SPINS(E)
- Threat
- B(B)+S(E),DCHECK
- Vars
- R(c);OGATE,P_PINB(I),P_SPINR(c),XS(E)::B(B),XR(c)
- Refutation
- P(e);XB(I)
- Try
- R(A);CHECK
- Vars
- K(f);N_GUARD,N_PINS(E),S_CUTS(h),S_FLIGHT::QAR1(G)
- Refutation
- S(h);N_PINS(E),P_SPINS(h)
- Try
- R(A);CHECK,XP(e)
- Vars
- P(g);OGATE,XR(A)::QAB1(G),XS(h)
- Refutation
- S(h);XR(A)
- Try
- Q(G);CHECK
- Vars
- S(h);N_PINS(E),P_SPINS(h)::B(B)+S(E),DCHECK
- Refutation
- K(f);P_SPINP(e),S_FLIGHT
- Try
- Q(G);
- Threat
- QAB(G),XP(i)
- Vars
- R(c);CHECK,OGATE,P_SPINR(c),XS(E)::B(B),XR(c)
- K(f);P_SPINP(e),S_FLIGHT::QAB1(G),XP(i)
- S(h);N_PINS(E)::B(B)+S(E),DCHECK
- Refutation
- P(d);N_PINS(E)
- Try
- Q(G);
- Threat
- QAB(G),XP(i)
- Vars
- R(c);CHECK,OGATE,P_SPINR(c),XS(E)::B(B),XR(c)
- K(f);P_SPINP(e),S_FLIGHT::QAB1(G),XP(i)
- S(h);N_PINS(E)::B(B)+S(E),DCHECK
- Refutation
- P(d);N_PINS(E)
- Try
- Q(G);
- Threat
- QAB(G),XP(i)
- Vars
- R(c);CHECK,OGATE,P_SPINR(c),XS(E)::B(B),XR(c)
- K(f);P_SPINP(e),S_FLIGHT::QAB1(G),XP(i)
- S(h);N_PINS(E)::B(B)+S(E),DCHECK
- Refutation
- P(d);N_PINS(E),P_SPINP(e)
- Try
- Q(G);
- Threat
- QAB(G),XP(i)
- Vars
- R(c);CHECK,OGATE,P_SPINR(c),XS(E)::B(B),XR(c)
- P(d);N_PINS(E)::B(B)+S(E),DCHECK
- S(h);N_PINS(E)::B(B)+S(E),DCHECK
- Refutation
- P(i);XQ(G)
- Try
- Q(G);
- Threat
- QAB(G),XP(i)
- Vars
- R(c);CHECK,OGATE,P_SPINR(c),XS(E)::B(B),XR(c)
- S(h);N_PINS(E)::B(B)+S(E),DCHECK
- Refutation
- P(d);N_PINS(E)
- Try
- Q(G);P_PINP(i)
- Threat
- QAB(G),XP(i)
- Vars
- R(c);CHECK,OGATE,P_SPINR(c),XS(E)::B(B),XR(c)
- K(f);N_SPINP(i),P_SPINP(e),S_FLIGHT::QAB1(G),XP(i)
- S(h);N_PINS(E)::B(B)+S(E),DCHECK
- Refutation
- P(d);N_PINS(E)
- Try
- Actual
- Q(G);
- Threat
- QAB(G),XP(i)
- Vars
- R(c);CHECK,OGATE,P_SPINR(c),XS(E)::B(B),XR(c)
- K(f);P_SPINP(e),S_FLIGHT::QAB1(G),XP(i)
- P(d);N_PINS(E)::B(B)+S(E),DCHECK
- S(h);N_PINS(E)::B(B)+S(E),DCHECK
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
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