MESON Chess Problem Database

Problem Display
PID: 2845 (3r3r/pbp2pbp/1p5q/8/Q6P/B2B1PPN/1R2P1N1/2k1nK1R w - - 0 1)

Loyd, Sam

New York Sunday Herald, 1889

3r3r/pbp2pbp/1p5q/8/Q6P/B2B1PPN/1R2P1N1/2k1nK1R

#2

12 + 12

5206 Sam Loyd and His Chess Problems 1913
3571 An English Bohemian 1933
5064 100 Years of the American Two-move Chess Problem 1962
5066 Classic Chess Problems by Pioneer Composers 1970
5065 Chess Problem Gems by Eight Eminent American Composers 1972
14475 Mat Plus Review 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Qd2
      • 2.Rb1#
    • 1...Rd4
      • 2.Ra2#
    • 1...Sc2
      • 2.Qxc2#
    • 1...Sxg2
      • 2.Kxg2#
      • 2.Qc2#
    • 1...Sxd3
      • 2.Qc2#
    • 1...Sxf3
      • 2.Qc2#
    • 1...f6
      • 2.Ra2#
  • Tries
    • 1.Sxe1?
      • threat
        • 2.Qc2#
      • 1...Qd2
        • 2.Rb1#
      • 1...Qc6!
    • 1.Sf2?
      • threat
        • 2.Qd1#
      • 1...Sc2
        • 2.Qxc2#
      • 1...Qd2
        • 2.Rb1#
      • 1...Rxd3!
    • 1.Bb4?
      • threat
        • 2.Rb1#
        • 2.Qa1#
      • 1...Kxb2
        • 2.Qa3#
      • 1...Rxd3
        • 2.Qa1#
      • 1...Sxd3
        • 2.Qc2#
        • 2.Qa1#
      • 1...Sc2
        • 2.Qxc2#
      • 1...Bc3
        • 2.Qa1#
      • 1...Bxb2!
    • 1.Bc5?
      • threat
        • 2.Qa1#
      • 1...Kxb2
        • 2.Qa3#
      • 1...Sc2
        • 2.Qxc2#
      • 1...Bxb2!
    • 1.Bd6?
      • threat
        • 2.Qa1#
      • 1...Kxb2
        • 2.Qa3#
      • 1...Sc2
        • 2.Qxc2#
      • 1...Bxb2!
    • 1.Be7?
      • threat
        • 2.Qa1#
      • 1...Kxb2
        • 2.Qa3#
      • 1...Sc2
        • 2.Qxc2#
      • 1...Bxb2!
    • 1.Rc2+?
      • 1...Kd1
        • 2.Sf2#
      • 1...Kb1!
    • 1.Rd2+?
      • 1...Bb2
        • 2.Rd1#
        • 2.Qd1#
      • 1...Kxd2!
    • 1.Qc4+?
      • 1...Kd1
        • 2.Sf2#
      • 1...Sc2
        • 2.Qxc2#
      • 1...Bc3!
    • 1.Qf4+?
      • 1...Kd1
        • 2.Sf2#
        • 2.Rb1#
        • 2.Rd2#
      • 1...Qxf4!
  • Keys
    • 1.Bf8!
      • threat
        • 2.Qa1#
      • 1...Kxb2
        • 2.Qa3#
      • 1...Bxb2
        • 2.Bxh6#
      • 1...Sc2
        • 2.Qxc2#

There are these afters: 654, 132338

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • Q(d);SBLOCK::B(F)+R(C),DCHECK
    • R(k);S_CUTB(i)::B(F)+R(C)
    • S(b);N_GUARD::QAR1(K),XS(b)
    • S(b);N_GUARD,XB(G)::QAR1(K)
    • S(b);N_GUARD,XP(H)::QAR1(K)
    • P(h);S_CUTB(i)::B(F)+R(C)
  • Tries
    • Try
      • S(E);XS(b)
      • Threat
        • QAR1(K)
      • Vars
        • Q(d);SBLOCK::B(F)+R(C),DCHECK
      • Refutation
        • Q(d);
    • Try
      • S(J);
      • Threat
        • QAR1(K)
      • Vars
        • S(b);N_GUARD::QAR1(K),XS(b)
        • Q(d);SBLOCK::B(F)+R(C),DCHECK
      • Refutation
        • R(k);XB(G)
    • Try
      • B(F);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);OGATEB,S_FLIGHT,XR(C)::QAB1(K)
        • R(k);XB(G)::QAR2(K)
        • S(b);N_GUARD::QAR1(K),XS(b)
        • B(i);::QAR2(K)
      • Refutation
        • B(i);XR(C)
    • Try
      • B(F);
      • Threat
        • QAR2(K)
      • Vars
        • K(a);OGATEB,S_FLIGHT,XR(C)::QAB1(K)
        • S(b);N_GUARD::QAR1(K),XS(b)
      • Refutation
        • B(i);XR(C)
    • Try
      • B(F);
      • Threat
        • QAR2(K)
      • Vars
        • K(a);OGATEB,S_FLIGHT,XR(C)::QAB1(K)
        • S(b);N_GUARD::QAR1(K),XS(b)
      • Refutation
        • B(i);XR(C)
    • Try
      • B(F);
      • Threat
        • QAR2(K)
      • Vars
        • K(a);OGATEB,S_FLIGHT,XR(C)::QAB1(K)
        • S(b);N_GUARD::QAR1(K),XS(b)
      • Refutation
        • B(i);XR(C)
    • Try
      • R(C);CHECK
      • Vars
        • K(a);P-FLIGHT::S(J)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(C);CHECK
      • Refutation
        • K(a);S_FLIGHT,XR(C)
    • Try
      • Q(K);CHECK
      • Vars
        • K(a);P-FLIGHT::S(J)
        • S(b);N_GUARD,P_SPINS(b)::QAR1(K),XS(b)
      • Refutation
        • B(i);P_SPINB(i)
    • Try
      • Q(K);CHECK
      • Refutation
        • Q(d);P_PINP(H),XQ(K)
  • Actual
    • B(F);
    • Threat
      • QAR2(K)
    • Vars
      • K(a);OGATEB,S_FLIGHT,XR(C)::QAB1(K)
      • B(i);OGATE,SBLOCK,XR(C)::B(F),XQ(d)
      • S(b);N_GUARD::QAR1(K),XS(b)
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