MESON Chess Problem Database

Problem Display
PID: 49074 (8/8/8/1p2p3/bB1pP3/PkpQP2p/6pR/R3K1NB w Q - 0 1)

Gruber, Bratoljub

Problem (Zagreb), 1955

8/8/8/1p2p3/bB1pP3/PkpQP2p/6pR/R3K1NB

#2

10 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Kb2
      • 2.Qb1#
    • 1...gxh1Q
      • 2.Rb1#
    • 1...gxh1S
      • 2.Rb1#
    • 1...gxh1B
      • 2.Rb1#
    • 1...gxh1R
      • 2.Rb1#
    • 1...dxe3
      • 2.Qxc3#
  • Tries
    • 1.Kd1?
      • 1...gxh1Q
        • 2.Rb1#
      • 1...gxh1S
        • 2.Rb1#
      • 1...gxh1B
        • 2.Rb1#
      • 1...gxh1R
        • 2.Rb1#
      • 1...dxe3
        • 2.Qxc3#
      • 1...Kb2+!
    • 1.Bxg2?
      • 1...Kb2
        • 2.Qb1#
      • 1...dxe3
        • 2.Qxc3#
      • 1...hxg2!
    • 1.Bxc3?
      • threat
        • 2.Bxd4#
      • 1...dxe3
        • 2.Bd4#
        • 2.Bxe5#
      • 1...dxc3!
    • 1.Rc1?
      • 1...Ka2
        • 2.Qb1#
      • 1...Kb2
        • 2.Qb1#
      • 1...gxh1Q
        • 2.Rb1#
      • 1...gxh1S
        • 2.Rb1#
      • 1...gxh1B
        • 2.Rb1#
      • 1...gxh1R
        • 2.Rb1#
      • 1...dxe3!
    • 1.Rd1?
      • 1...Ka2
        • 2.Qb1#
      • 1...Kb2
        • 2.Qb1#
      • 1...gxh1Q
        • 2.Rb1#
      • 1...gxh1S
        • 2.Rb1#
      • 1...gxh1B
        • 2.Rb1#
      • 1...gxh1R
        • 2.Rb1#
      • 1...dxe3!
    • 1.Ra2?
      • 1...gxh1Q
        • 2.Rab2#
        • 2.Rhb2#
      • 1...gxh1S
        • 2.Rab2#
        • 2.Rhb2#
      • 1...gxh1B
        • 2.Rab2#
        • 2.Rhb2#
      • 1...gxh1R
        • 2.Rab2#
        • 2.Rhb2#
      • 1...dxe3
        • 2.Qd5#
      • 1...Kxa2!
    • 1.Qe2?
      • threat
        • 2.Rb1#
        • 2.Qa2#
      • 1...d3
        • 2.Qa2#
      • 1...c2!
    • 1.Qxd4?
      • threat
        • 2.Qxc3#
      • 1...Kb2
        • 2.Qxc3#
      • 1...Kc2
        • 2.Qxc3#
      • 1...c2
        • 2.Qc3#
      • 1...exd4!
    • 1.exd4?
      • threat
        • 2.Qxc3#
      • 1...Kb2
        • 2.Qb1#
        • 2.Qxc3#
      • 1...exd4!
  • Keys
    • 1.0-0-0!
      • 1...Ka2
        • 2.Qb1#
      • 1...gxh1Q
        • 2.Rb2#
      • 1...gxh1S
        • 2.Rb2#
      • 1...gxh1B
        • 2.Rb2#
      • 1...gxh1R
        • 2.Rb2#
      • 1...dxe3
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 5
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(b);N_SPINP(c),P-FLIGHT,P_SPINP(a)::QAR1(G)
    • P(a);P_PINS(C),XB(D)::R(A)
    • P(a);XB(D)::R(A)
    • P(f);N_GUARD,XP(H)::QAR1(G),XP(c)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Vars
        • P(a);P_PINS(C),XB(D)::R(A)
        • P(a);XB(D)::R(A)
        • P(f);N_GUARD,XP(H)::QAR1(G),XP(c)
      • Refutation
        • K(b);CHECK,N_SPINP(c),P-FLIGHT,P_SPINP(a)
    • Try
      • B(D);XP(a)
      • Vars
        • K(b);N_SPINP(c),P-FLIGHT::QAR1(G)
        • P(f);N_GUARD,XP(H)::QAR1(G),XP(c)
      • Refutation
        • P(d);XB(D)
    • Try
      • B(I);XP(c)
      • Threat
        • QAR(G)+B(I),XP(f)
      • Refutation
        • P(f);P_SPINP(f),XB(I)
    • Try
      • R(A);
      • Vars
        • K(b);N_SPINP(c),P_SPINP(a),S_FLIGHT::QAB1(G)
        • K(b);N_SPINP(c),P-FLIGHT,P_SPINP(a)::QAR1(G)
        • P(a);P_PINS(C),XB(D)::R(A)
        • P(a);XB(D)::R(A)
      • Refutation
        • P(f);XP(H)
    • Try
      • R(A);
      • Vars
        • K(b);N_SPINP(c),P_SPINP(a),S_FLIGHT::QAB1(G)
        • K(b);N_SPINP(c),P-FLIGHT,P_SPINP(a)::QAR1(G)
        • P(a);P_PINS(C),XB(D)::R(A)
        • P(a);XB(D)::R(A)
      • Refutation
        • P(f);XP(H)
    • Try
      • R(A);
      • Vars
        • P(f);OGATE,XP(H)::QAB(G)
      • Refutation
        • K(b);N_SPINP(c),P_SPINP(a),S_FLIGHT,XR(A)
    • Try
      • Q(G);N_PINP(c)
      • Threat
        • DUALS(2)
      • Vars
        • P(f);::QAB1(G)
      • Refutation
        • P(c);
    • Try
      • Q(G);N_PINP(c),XP(f)
      • Threat
        • QAR1(G),XP(c)
      • Vars
        • K(b);P-FLIGHT,P_SPINP(a)::QAB1(G),XP(c)
        • K(b);P_SPINP(a),S_FLIGHT::QAR1(G),XP(c)
        • P(c);::QAR1(G)
      • Refutation
        • P(h);XQ(G)
    • Try
      • P(H);XP(f)
      • Threat
        • QAR1(G),XP(c)
      • Refutation
        • P(h);XP(H)
  • Actual
    • K(B);0-0-0
    • Vars
      • K(b);N_SPINP(c),P_SPINP(a),S_FLIGHT::QAB1(G)
      • P(a);OGATE,XB(D)::R1(E)
      • P(f);OGATE,XP(H)::QAB(G)
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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).