MESON Chess Problem Database

Problem Display
PID: 259104 (1RQ5/3p3q/2r2N2/3R4/1pkBp3/4p3/2P5/KN4b1 w - - 0 1)

Kovacevic, Marjan

3rd HM., 09. World Cup, 2021

1RQ5/3p3q/2r2N2/3R4/1pkBp3/4p3/2P5/KN4b1

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rc5
      • 2.Qxc5#
    • 1...Rc7
      • 2.Qa6#
      • 2.Qxc7#
    • 1...Rxc8
      • 2.Rxc8#
    • 1...e2
      • 2.Sd2#
    • 1...b3
      • 2.Sa3#
    • 1...d6
      • 2.Qxc6#
  • Tries
    • 1.Bc3?
      • threat
        • 2.Rxb4#
      • 1...bxc3
        • 2.Sa3#
      • 1...b3
        • 2.Rb4#
        • 2.cxb3#
      • 1...Qe7!
    • 1.Bb6?
      • threat
        • 2.Qa6#
      • 1...Rxc8
        • 2.Rxc8#
      • 1...Rc5
        • 2.Qxc5#
      • 1...b3!
    • 1.Ba7?
      • threat
        • 2.Rd4#
      • 1...Rc5
        • 2.Qxc5#
      • 1...e2!
    • 1.Rc5+?
      • 1...Rxc5
        • 2.Qxc5#
      • 1...Kxd4!
    • 1.Rb6?
      • threat
        • 2.Qa6#
      • 1...Rc5
        • 2.Qxc5#
      • 1...Rxc8!
    • 1.Qb7?
      • threat
        • 2.Qxb4#
        • 2.Qb5#
      • 1...Ra6+
        • 2.Qxa6#
      • 1...Rxf6
        • 2.Qb5#
      • 1...Qe7
        • 2.Qb5#
      • 1...Rc5
        • 2.Qxb4#
      • 1...b3
        • 2.Sa3#
        • 2.Qxb3#
        • 2.Qb4#
        • 2.Qb5#
      • 1...Rb6!
  • Keys
    • 1.Bc5!
      • threat
        • 2.Rxb4#
      • 1...Ra6+
        • 2.Qxa6#
      • 1...Rxc5
        • 2.Qxc5#
      • 1...Rxf6
        • 2.Rd4#
      • 1...Rb6
        • 2.Bxb6#
      • 1...b3
        • 2.Rb4#
        • 2.cxb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • R(f);OGATE::QAR1(H),XR(f)
    • R(f);N_SPINR(f),OGATE,XQ(H)::R(G),XR(f)
    • P(b);N_GUARD::S(B)
    • P(c);N_GUARD::S(B)
    • P(g);N_GUARD::QAR2(H),XR(f)
  • Tries
    • Try
      • B(D);
      • Threat
        • R1(G),XP(c)
      • Vars
        • P(c);N_GUARD,SBLOCK,XB(D)::S(B)
      • Refutation
        • Q(h);
    • Try
      • B(D);
      • Threat
        • QAB(H)
      • Vars
        • R(f);N_SPINR(f),OGATE,XQ(H)::R(G),XR(f)
        • R(f);OGATE::QAR1(H),XR(f)
      • Refutation
        • P(c);
    • Try
      • B(D);
      • Threat
        • R1(E)
      • Vars
        • R(f);OGATE::QAR1(H),XR(f)
      • Refutation
        • P(b);
    • Try
      • R(E);CHECK,N_PINR(f)
      • Vars
        • R(f);OGATE,P_SPINR(f),XR(E)::QAR1(H),XR(f)
      • Refutation
        • K(d);P-FLIGHT,XB(D)
    • Try
      • R(G);
      • Threat
        • QAB(H)
      • Vars
        • R(f);OGATE::QAR1(H),XR(f)
      • Refutation
        • R(f);N_SPINR(f),XQ(H)
    • Try
      • Q(H);N_PINR(f)
      • Threat
        • DUALS(2)
      • Vars
        • R(f);CHECK,N_GUARD::QAB(H),XR(f)
        • R(f);XS(F)::QAB1(H)
        • Q(h);::QAB1(H)
        • R(f);::QAR1(H),XP(c)
      • Refutation
        • R(f);
  • Actual
    • B(D);N_PINR(f)
    • Threat
      • R1(G),XP(c)
    • Vars
      • R(f);CHECK,N_GUARD::QAB(H),XR(f)
      • R(f);OGATE,P_SPINR(f),XB(D)::QAR1(H),XR(f)
      • R(f);XS(F)::R1(E)
      • R(f);OGATEB::QAR(H)+B(D),XR(f)
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